CN113186938B - Deep foundation pit supporting and reinforcing construction method - Google Patents
Deep foundation pit supporting and reinforcing construction method Download PDFInfo
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- CN113186938B CN113186938B CN202110492095.3A CN202110492095A CN113186938B CN 113186938 B CN113186938 B CN 113186938B CN 202110492095 A CN202110492095 A CN 202110492095A CN 113186938 B CN113186938 B CN 113186938B
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 44
- 238000010276 construction Methods 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 186
- 239000010959 steel Substances 0.000 claims abstract description 186
- 230000000694 effects Effects 0.000 claims abstract description 14
- 238000004873 anchoring Methods 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims description 33
- 238000005096 rolling process Methods 0.000 claims description 20
- 238000003780 insertion Methods 0.000 claims description 17
- 230000037431 insertion Effects 0.000 claims description 17
- 238000005507 spraying Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 5
- 244000025254 Cannabis sativa Species 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000008262 pumice Substances 0.000 claims description 3
- 241000826860 Trapezium Species 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 11
- 239000002002 slurry Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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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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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to a deep foundation pit supporting and reinforcing construction method, which adopts a deep foundation pit steel mesh laying device, wherein the deep foundation pit steel mesh laying device comprises two upper support plates, two connecting rods, two guide plates, a placing frame and a limiting mechanism, and one end of each upper support plate is provided with an inserted rod; the construction method for supporting and reinforcing the deep foundation pit side slope by adopting the deep foundation pit steel mesh laying device comprises the following steps: s1, finishing a side slope; s2, anchoring the steel bars; s3, placing a steel net coil; s4, laying steel nets. The invention can solve the problems existing in the process of manually laying the steel mesh: when the foundation ditch is darker, it is comparatively inconvenient that artifical lay the steel mesh, and when the steel mesh unreeled from the upper end of side slope, the steel mesh was rolled up and can be blocked on the reinforcing bar, causes the unable smooth and easy laying of steel mesh, can produce fold and steel mesh and can't stretch out when the steel mesh is rolled up and is laid for the laying effect of steel mesh subalternation problem.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a deep foundation pit supporting and reinforcing construction method.
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 support mainly has the following forms: the device can be used for supporting a row pile, a pile support, a pile anchor and a row pile cantilever; supporting a wall-underground diaphragm wall, namely a wall-underground diaphragm wall and a support; ⒊ a cement retaining wall; 4. and spray anchor support and the like.
The most common mode of spray anchor is used for reinforcing the foundation pit side slope, when the spray anchor construction is carried out on the foundation pit side slope, firstly, the steel bar needs to be anchored on the foundation pit side slope, then the steel mesh is laid on the side slope, the laid steel mesh and the steel bar are bundled by adopting steel wires, and finally, the mortar spraying operation is carried out on the side slope in a mortar spraying mode; the aforesaid carries out laying of steel mesh to the side slope of foundation ditch generally adopts artificial mode to lay, and the problem that exists when artifical lay the steel mesh is as follows:
when the foundation ditch is darker, it is comparatively inconvenient artifical to lay the steel mesh, and artifical the laying can have certain potential safety hazard, and when the steel mesh unreeled from the upper end of side slope, the steel mesh was rolled up and can be blocked on the reinforcing bar, caused the unable smooth and easy laying of steel mesh, can produce fold and steel mesh and can't stretch over straightly when the steel mesh was rolled up and is laid for laying of steel mesh effect is poor, needs the manual work to promote when the reinforcing bar joint on steel mesh and the side slope.
Disclosure of Invention
In order to solve the problems, the invention provides a deep foundation pit supporting and reinforcing construction method which adopts a deep foundation pit steel mesh laying device, wherein the deep foundation pit steel mesh laying device comprises two upper support plates, connecting rods, guide plates, a placing frame and a limiting mechanism, one end of each upper support plate is provided with an inserted rod, one end of each upper support plate, close to each inserted rod, in the middle of each upper support plate is connected through the connecting rod, the other end of each upper support plate is provided with the guide plate through a hinge, the side surface of each guide plate is provided with a dovetail sliding groove, the placing frame is positioned between the two guide plates, two ends of the placing frame are respectively provided with a guide sliding column, each guide sliding column is of an L-shaped structure, the transverse section of each guide sliding column is provided with a dovetail sliding block matched with the dovetail sliding groove in a sliding manner, the side edge, far away from the guide plates, of the placing frame is provided with a groove, the limiting mechanism is connected in the groove of the placing frame, the steel mesh can be laid on the side slope of the foundation pit, so that the strength of the side slope after slurry spraying is increased when the side slope is subjected to slurry spraying operation, the upper support plates are locked on the ground at the upper end of the side slope through the insertion rods, the upper support plates can be connected into a whole under the action of the connecting rods, the guide plates can be laid on the side face of the side slope under the action of the hinges, then the lower end of the guide plates is locked on the side slope, the steel mesh can be placed in the placing frame, and the steel mesh in the placing frame can be in a stretched state through the limiting mechanism, so that the flatness of steel mesh laying is increased.
The placing frame is of a square frame structure with an opening at the upper end; the limiting mechanism comprises a rotating plate which is arranged on the lower side wall of a groove on a placing frame through a hinge, the upper end of the rotating plate is clamped on the placing frame, a limiting elastic column is connected to the rotating plate in a sliding fit mode, one end, close to a guide plate, of the limiting elastic column is provided with a limiting roller through a roller plate, the limiting roller abuts against the inner wall of one side, close to the guide plate, of the placing frame, when the steel mesh is laid, a steel mesh roll can be placed in the placing frame through rotation of the rotating plate in the groove on the placing frame, the rotating plate is locked on the placing frame in a clamping mode, the rotating plate cannot rotate when the steel mesh is laid, the free end of the steel mesh is taken out of the placing frame and locked on the land between upper support plates, the position of the upper end of the steel mesh is positioned, and the limiting roller can abut against the inner wall of the left side of the placing frame with a certain force under the action of the limiting elastic column, the steel mesh can be in a stretched state, and the placing frame can not move under the effect of no external force.
The lower end of the guide plate is provided with a stable inserting column for positioning the guide plate; the upper side surface of the rotating plate is provided with an extrusion assembly; the extrusion assembly comprises an extrusion support plate arranged on the upper side surface of the rotating plate, an extrusion elastic column is connected to the extrusion support plate in a sliding fit mode, and a leveling pressing plate is arranged at one end, close to the guide plate, of the extrusion elastic column; the bottom of placing the frame be provided with the stay cord, concrete during operation, the post is inserted firmly and the lower extreme locking that can be with the deflector is on the side slope, the extrusion subassembly can be with the steel mesh extrusion on the reinforcing bar that sets up on the side slope, after the position locking of steel mesh upper end was accomplished, can drive through artifical pulling stay cord downwards and place the frame downstream, level and smooth clamp plate can have the steel mesh that will stretch out straightly of certain dynamics under the effect of extrusion bullet post and attach on the side slope, make the steel mesh can block on the reinforcing bar of side slope, fold and incline can not take place for the reinforcing bar when this kind of laying mode can, and the steel mesh can not follow the reinforcing bar and shift out, increase the effect of laying of steel mesh.
The construction method for supporting and reinforcing the deep foundation pit side slope by adopting the deep foundation pit steel mesh laying device comprises the following steps:
s1, slope finishing: after the foundation pit excavation construction is finished, carrying out leveling treatment on the foundation pit side slope, and removing pumice and grass root sundries on the side slope, so that the foundation pit side slope is in a basically flat state;
s2, steel bar anchoring: anchoring the steel bars on the slope to be reinforced at equal intervals, so that the steel bars can be stably inserted on the slope, and the outer ends of the steel bars are arranged into a hook shape;
s3, placing a steel net roll: after the steel bars on the side slope are anchored, the upper support plate is locked on the soil at the upper end of the side slope through the insertion rods, the guide plate is made to be lapped on the side face of the side slope, the guide plate is inserted in the soil on the side slope through the stable insertion columns, then the rotating plate rotates towards the outer side of the placing frame, the steel mesh coil is placed in the placing frame, the free end of the steel mesh is locked at the position between the upper support plates, then the rotating plate is clamped at the initial position of the placing frame, the limiting roller can press the steel mesh on the inner wall, close to the guide plate, of the placing frame, and therefore the placing frame cannot move downwards under the action of no external force;
s4, steel mesh laying: place the stay cord of frame bottom through artifical downward pulling and make and place the frame and can the downstream, level and smooth clamp plate can press the steel mesh on the crotch shape of the reinforcing bar of side slope setting under the effect of extrusion bullet post, the extrusion force through spacing roller makes the steel mesh be in the state of tightening straight, place the direction traveller on the frame and can slide on dovetail groove, when placing the lower extreme that the frame removed dovetail groove, the completion can be laid to the steel mesh, pass through the iron wire ligature on the reinforcing bar again with the steel mesh, the steel mesh is whole to be laid and is accomplished the back, carry out the spraying construction of concrete mortar to the side slope.
As a preferable technical scheme of the invention, two ends of the connecting rod penetrate through the upper support plate, an internal pressure spring is arranged outside the outer end of the connecting rod and is arranged between the outer end of the connecting rod and the opposite side surface of the upper support plate, and the internal pressure spring enables the upper support plate to have inward kinetic energy.
As a preferred technical scheme of the invention, the middle part of the connecting rod is connected with an adjusting sleeve in a rotating fit manner, both ends of the connecting rod, which are positioned at the inner side of the upper support plate, are provided with external threads, the directions of the external threads on the connecting rod are opposite, the external threads of the connecting rod are connected with a jacking sleeve in a threaded fit manner, the opposite ends of the jacking sleeve are abutted against the opposite side surfaces of the upper support plate, the jacking sleeve is connected with the adjusting sleeve through an arc-shaped plate of a telescopic structure, the middle part of the guide sliding column is of a telescopic structure, the jacking sleeve can be synchronously driven to move inside and outside by manually rotating the adjusting sleeve, when the top extension sleeve moves inwards, the upper supporting plate can synchronously move inwards under the action of the internal pressure spring, when the top extension sleeve moves outwards, the top is stretched the cover and can be driven and is gone up the backup pad and outwards be removed, and the arc can cooperate concertina movement with the direction traveller when going on inside and outside removal to go up the backup pad.
As a preferred technical scheme of the invention, the end face of the rotating plate is provided with a locking slot, a positioning insertion column is arranged in the locking slot, the positioning insertion column penetrates through the placing frame, the outer side of the end face of the placing frame is provided with a U-shaped support, a sliding elastic column is connected to the U-shaped support in a sliding fit mode, one end, corresponding to the placing frame, of the sliding elastic column is connected with the positioning insertion column, the rotating plate can be locked by inserting the positioning insertion column into the locking slot, and when the rotating plate needs to rotate, the sliding elastic column is pulled outwards to enable the positioning insertion column to move out of the locking slot, so that a steel mesh roll can be placed in the placing frame.
As a preferred technical scheme of the invention, the anti-rolling plate is mounted on the bottom of the roller plate through the elastic telescopic column, the elastic telescopic column is obliquely arranged, after the steel mesh roll is placed in the placing frame, the rotating plate is controlled to be locked at an initial position, the anti-rolling plate can be supported on the upper left side of the steel mesh roll with a certain force under the action of the elastic telescopic column, so that when the placing frame moves downwards, the steel mesh roll is unreeled in the anti-rolling plate, the diameter of the steel mesh roll can be reduced after unreeling, and the elastic telescopic column can extend in a matched manner, so that the anti-rolling plate can be always attached to the outer side of the steel mesh roll, and the unreeling stability of the steel mesh roll can be improved in a manner of carrying out limiting unreeling on the steel mesh roll.
As a preferred technical scheme, the anti-rolling plate is of an arc-shaped structure, the arc-shaped groove is formed in the middle of the anti-rolling plate, the unwinding rollers are arranged in the arc-shaped groove of the anti-rolling plate at equal intervals along the arc-shaped structure, the anti-blocking rollers are arranged at the bottom of the anti-rolling plate, and the unwinding rollers can rotate in a matched mode when the steel mesh coil is unwound, so that unwinding stability of the steel mesh coil is improved, and the anti-blocking rollers can prevent the steel mesh coil from being blocked at the lower end of the anti-rolling plate to cause the fact that the steel mesh coil cannot be unwound.
As a preferred technical scheme of the invention, the side face of the leveling press plate, which corresponds to the guide plate, is uniformly provided with square grooves along the length direction, the position of the grooves above the leveling press plate corresponds to the position of the steel bars on the side slope, the leveling press plate can press the steel mesh on the steel bars, and the hook-shaped structures on the steel bars hook the steel mesh, so that the steel mesh cannot fall off from the steel bars, the upper end of the side edge of the placing frame, which corresponds to the rotating plate, is provided with arc-shaped chamfers, and the arc-shaped chamfers on the placing frame enable the side edge of the placing frame not to damage the steel mesh.
As a preferred technical scheme of the invention, the side surface of the guide plate is provided with guide supports along the length direction, the guide supports are provided with guide bulges at equal intervals along the length direction, the intervals between the guide bulges are equal to the intervals between the steel bars on the side slope, the side surface of the leveling press plate far away from the guide plate is provided with follow-up columns matched with the guide bulges, when the reinforcing steel bar on the side slope is anchored, a certain length of the reinforcing steel bar is reserved sometimes, and when the placing frame drives the leveling pressing plate to move downwards, the leveling pressing plate can be clamped on the reinforcing steel bar, through the arrangement of the follow-up columns and the guide bulges, the leveling pressure plate can move rightwards under the guide action of the guide bulges before the leveling pressure plate is contacted with the reinforcing steel bars, so that the reinforcing steel bars can not influence the movement of the leveling pressure plate, when the follow-up column is separated from the guide bulge, the flat pressing plate can be pressed on the steel net again under the action of the extrusion elastic column.
As a preferred technical scheme of the invention, the follow-up column is of an L-shaped structure, the transverse section of the follow-up column is positioned on the outer side of the guide plate, the guide protrusion is of a trapezoidal structure, chamfers are arranged at two ends of the side surface of the follow-up column corresponding to the guide protrusion, and the guide protrusion is matched with the chamfers on the follow-up column to enable the follow-up column to move left and right stably.
As a preferred technical scheme of the invention, two groups of threaded holes are formed in the upper end and the lower end of the guide plate, the guide support is mounted on the threaded holes of the guide plate through bolts, and the upper position and the lower position of the guide support can be adjusted by locking the guide support on the threaded holes in different positions on the guide plate, so that the guide bulges correspond to the positions of the steel bars on the side slope one by one.
The invention has the beneficial effects that:
the steel mesh roll can be laid on a side slope when a foundation pit side slope is reinforced, the steel mesh roll is unreeled in a mode of locking the steel mesh roll in a placing frame, and the steel mesh is pressed on a steel bar arranged on the side slope in a straightening mode, so that the laying effect of the steel mesh is improved, the steel mesh is prevented from being wrinkled and bent, and the steel mesh roll can be limited and can be stably unreeled;
the upper support plate is locked on the ground at the upper end of the side slope through the insertion rod, the upper support plate can be connected into a whole under the action of the connection rod, the guide plate can be lapped on the side face of the side slope under the action of the hinge, and then the lower end of the guide plate is locked on the side slope, so that the structure formed by the upper support plate and the guide plate can be guided when steel meshes are laid;
the limiting roller can have certain force to support the steel mesh on the inner wall of the left side of the placing frame under the action of the limiting elastic column, so that the steel mesh can be in a stretched straight state, and the flat pressing plate can have certain force to attach the stretched straight steel mesh to the steel bar of the side slope under the action of the extruding elastic column;
the unwinding roller can rotate in a matched manner when the steel mesh coil is unwound, so that the unwinding stability of the steel mesh coil is improved, and the anti-blocking roller can prevent the steel mesh coil from being blocked at the lower end of the anti-rolling plate, so that the steel mesh coil cannot be unwound;
and fifthly, when the reinforcing steel bars on the side slope need to be reserved for a certain length, the follow-up columns are clamped on the guide protrusions, so that the leveling pressing plate can move rightwards under the guide effect of the guide protrusions before the leveling pressing plate is contacted with the reinforcing steel bars, and the reinforcing steel bars cannot influence the movement of the leveling pressing plate.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic view of a first configuration of the present invention;
FIG. 3 is a second schematic structural view of the present invention;
FIG. 4 is a schematic view of the present invention with the upper plate and the connecting rod removed;
FIG. 5 is a schematic structural view of the placement frame, the limiting mechanism and the extrusion assembly of the present invention;
FIG. 6 is a cross-sectional view between the placement frame and the rotating plate of the present invention;
FIG. 7 is a cross-sectional view of the placement frame, the rotation plate, the positioning post, the U-shaped bracket and the sliding spring post of the present invention;
fig. 8 is a schematic structural view of the steel net according to the present invention when it is laid.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 2-8, a deep foundation pit supporting and reinforcing construction method adopts a deep foundation pit steel mesh laying device, the deep foundation pit steel mesh laying device comprises an upper support plate 1, a connecting rod 2, guide plates 3, a placing frame 4 and a limiting mechanism 5, the number of the upper support plate 1 is two, one end of the upper support plate 1 is provided with an inserted rod 11, one end of the middle part of the upper support plate 1 close to the inserted rod 11 is connected through the connecting rod 2, the other end of the upper support plate 1 is provided with the guide plate 3 through a hinge, the side surface of the guide plate 3 is provided with a dovetail chute 31, the placing frame 4 is positioned between the two guide plates 3, two ends of the placing frame 4 are respectively provided with a guide sliding column 41, the guide sliding column 41 is of an L-shaped structure, the transverse section of the guide sliding column 41 is provided with a sliding block which is in sliding fit with the dovetail chute 31, the side of the placing frame 4 far away from the guide plate 3 is provided with a groove, the limiting mechanism 5 is connected in the groove of the placing frame 4, steel meshes can be laid on the side slope of the foundation pit, so that the strength of the side slope after slurry spraying is increased when the side slope is subjected to slurry spraying operation, the upper support plate 1 is locked on the ground at the upper end of the side slope through the insertion rod 11, the upper support plate 1 can be connected into a whole under the action of the connecting rod 2, the guide plate 3 can be put on the side face of the side slope under the action of the hinge, then the lower end of the guide plate 3 is locked on the side slope, the steel meshes can be placed in the placing frame 4, and the steel meshes in the placing frame 4 can be in a stretched state through the limiting mechanism 5, so that the flatness of steel mesh laying is increased.
Both ends of the connecting rod 2 penetrate through the upper support plate 1, an inner pressure spring 12 is arranged on the outer end of the connecting rod 2, the inner pressure spring 12 is installed between the outer end of the connecting rod 2 and the opposite side face of the upper support plate 1, and the inner pressure spring 12 enables the upper support plate 1 to have inward kinetic energy.
The middle part of the connecting rod 2 is connected with an adjusting sleeve 13 in a rotating fit mode, both ends of the connecting rod 2, which are positioned at the inner side of the upper support plate 1, are provided with external threads, the directions of the external threads on the connecting rod 2 are opposite, the external threads of the connecting rod 2 are connected with a top extension sleeve 14 in a thread fit mode, the opposite ends of the top extension sleeve 14 are abutted against the opposite side surfaces of the upper support plate 1, the top extension sleeve 14 is connected with the adjusting sleeve 13 through an arc-shaped plate 15 with an extension structure, the middle part of the guide sliding column 41 is of a telescopic structure, the jacking sleeve 14 can be synchronously driven to move inside and outside by manually rotating the adjusting sleeve 13, when the jacking sleeve 14 moves inwards, the upper support plate 1 can synchronously move inwards under the action of the internal compression spring 12, when the jacking sleeve 14 moves outwards, the jacking sleeve 14 can drive the upper support plate 1 to move outwards, and the arc-shaped plate 15 and the guide sliding column 41 can move telescopically in a matching manner when the upper support plate 1 moves inwards and outwards.
The placing frame 4 is of a square frame structure with an opening at the upper end; the limiting mechanism 5 comprises a rotating plate 51 which is arranged on the lower side wall of a groove on the placing frame 4 through a hinge, the upper end of the rotating plate 51 is clamped on the placing frame 4, a limiting elastic column 52 is connected to the rotating plate 51 in a sliding fit manner, a limiting roller 53 is arranged at one end, close to the guide plate 3, of the limiting elastic column 52 through a roller plate, the limiting roller 53 abuts against the inner wall of one side, close to the guide plate 3, of the placing frame 4, during specific work, a steel mesh roll can be placed in the placing frame 4 through rotation of the rotating plate 51 in the groove on the placing frame 4, the rotating plate 51 is locked on the placing frame 4 through a clamping manner, the rotating plate 51 cannot rotate when the steel mesh is laid, the free end of the steel mesh is taken out of the placing frame 4 and locked on the ground between the upper support plates 1, the position of the upper end of the steel mesh is positioned, the limiting roller 53 can abut against the inner wall of the left side of the placing frame 4 with a certain force under the action of the limiting elastic column 52, so that the steel net can be in a stretched state, and the placing frame 4 can not move under the condition of no external force.
The terminal surface of rotor plate 51 be provided with locking slot 54, be provided with the location in the locking slot 54 and insert post 55, the location is inserted post 55 and is passed and place frame 4, the terminal surface outside of placing frame 4 is provided with U type support 56, be connected with slip bullet post 57 through sliding fit's mode on the U type support 56, slip bullet post 57 is connected with location plug post 55 corresponding one end of placing frame 4, insert post 55 and alternate in locking slot 54 through the location and can lock rotor plate 51, when rotor plate 51 need rotate, outwards stimulate slip bullet post 57 and make the location insert post 55 follow locking slot 54 and shift out, make the steel mesh book can place and place in placing frame 4.
The bottom of roller board on install through flexible post 58 and prevent rolling up board 59, flexible post 58 slope is arranged, place back in placing frame 4 when the steel net book, control rotor plate 51 locking is at the initial position, prevent rolling up board 59 can have the support of certain dynamics in the upper left side of steel net book under the effect of flexible post 58, thereby when placing frame 4 downstream, the steel net book unreels the action in preventing rolling up board 59, its diameter can reduce after the steel net book unreels, flexible post 58 can cooperate the extension this moment, so that prevent rolling up board 59 can laminate the outside at the steel net book all the time, can increase the stability that the steel net book unreeled through carrying out spacing the mode of unreeling with the steel net book.
Prevent roll up board 59 be the arc structure, the middle part of preventing roll up board 59 is provided with the arc wall, the arc wall of preventing roll up board 59 is provided with along its arc structure equidistant unreeling gyro wheel 591, the bottom of preventing roll up board 59 is provided with anti-sticking gyro wheel 592, unreeling gyro wheel 591 can cooperate the rotation when the steel mesh book unreels to increase the stationarity of unreeling of steel mesh book, anti-sticking gyro wheel 592 can prevent that the steel mesh book from blocking at the lower extreme of preventing roll up board 59, causing the steel mesh book can't unreel.
The lower end of the guide plate 3 is provided with a stable inserting column 32 for positioning the guide plate; the upper side surface of the rotating plate 51 is provided with an extrusion assembly 6; the extrusion assembly 6 comprises an extrusion support plate 61 arranged on the upper side surface of the rotating plate 51, an extrusion elastic column 62 is connected to the extrusion support plate 61 in a sliding fit mode, and a leveling pressing plate 63 is arranged at one end, close to the guide plate 3, of the extrusion elastic column 62; the bottom of placing frame 4 be provided with the stay cord, concrete during operation, the post 32 is inserted firmly can lock the lower extreme of deflector 3 on the side slope, extrusion subassembly 6 can be with the steel mesh extrusion on the reinforcing bar that sets up on the side slope, after the position locking of steel mesh upper end was accomplished, can drive through artifical pulling stay cord downwards and place frame 4 downstream, level and smooth clamp plate 63 can have the steel mesh of certain dynamics with straightening under the effect of extrusion bullet post 62 and attach on the side slope, make the steel mesh can block on the reinforcing bar of side slope, this kind of laying mode can make the reinforcing bar can not take place fold and incline, and the steel mesh can not follow the reinforcing bar and shift out, increase the effect of laying of steel mesh.
The side that levels clamp plate 63 corresponds deflector 3 evenly is provided with the square groove along its length direction, the position that levels clamp plate 63 top groove is corresponding with the position of reinforcing bar on the side slope, this kind of setting makes and levels clamp plate 63 can press the steel mesh on the reinforcing bar to make the hook-like structure on the reinforcing bar hook the steel mesh, thereby the steel mesh can not drop from the reinforcing bar, the side upper end of placing frame 4 and corresponding rotor plate 51 be provided with the arc chamfer, place the arc chamfer on the frame 4 and make the side of placing frame 4 can not cause the damage to the steel mesh.
The side surface of the guide plate 3 is provided with guide brackets 33 along the length direction thereof, the guide brackets 33 are provided with guide bulges 34 along the length direction thereof at equal intervals, the interval between the guide bulges 34 is equal to the interval between the steel bars on the side slope, the side surface of the leveling pressure plate 63 far away from the guide plate 3 is provided with follow-up columns 64 matched with the guide bulges 34, when the reinforcing steel bar on the side slope is anchored, a certain length of the reinforcing steel bar is reserved sometimes, and at the moment, when the placing frame 4 drives the leveling pressing plate 63 to move downwards, the leveling pressing plate 63 is clamped on the reinforcing steel bar, through the arrangement of the follow-up columns 64 and the guide protrusions 34, the leveling pressure plate 63 can move rightwards under the guide action of the guide protrusions 34 before the leveling pressure plate 63 is contacted with the steel bars, so that the steel bars cannot influence the movement of the leveling pressure plate 63, when the follower post 64 is separated from the guide projection 34, the flat pressing plate 63 can be pressed again on the steel mesh by the pressing elastic post 62.
Follow-up post 64 be L type structure, the horizontal section of follow-up post 64 is located the outside of deflector 3, guide protrusion 34 is the trapezium structure, follow-up post 64 corresponds the side both ends of guide protrusion 34 and all is provided with the chamfer, guide protrusion 34 cooperatees with the chamfer on follow-up post 64 and makes follow-up post 64 can be stable move about.
The upper and lower both ends of deflector 3 all be provided with two sets of screw holes, guide bracket 33 passes through the bolt and installs on the screw hole of deflector 3, through with guide bracket 33 locking on the screw hole of different positions on deflector 3, the upper and lower position of guide bracket 33 can be adjusted for guide protrusion 34 and the reinforcing bar position one-to-one on the side slope.
As shown in fig. 1, the construction method for supporting and reinforcing the deep foundation pit side slope by using the deep foundation pit steel mesh laying device comprises the following steps:
s1, slope finishing: after the foundation pit excavation construction is finished, carrying out leveling treatment on the foundation pit side slope, and removing pumice and grass root sundries on the side slope, so that the foundation pit side slope is in a basically flat state;
s2, steel bar anchoring: anchoring the steel bars on the slope to be reinforced at equal intervals, so that the steel bars can be stably inserted on the slope, and the outer ends of the steel bars are arranged into a hook shape;
s3, placing a steel net roll: after the steel bars on the side slope are anchored, the upper support plate 1 can be synchronously driven to move inside and outside through manually rotating the adjusting sleeve 13, so that steel nets with different widths can be laid, the upper support plate 1 is locked on the ground at the upper end of the side slope through the insertion rods 11, the guide plate 3 is lapped on the side surface of the side slope, the guide plate 3 is inserted on the ground of the side slope through the stable insertion columns 32, then the rotating plate 51 is rotated towards the outer side of the placing frame 4, so that a steel net roll is placed in the placing frame 4, the free end of the steel net is locked at the position between the upper support plates 1, the rotating plate 51 is clamped at the initial position of the placing frame 4, the limiting roller 53 can press the steel net on the inner wall of the placing frame 4 close to the guide plate 3, the placing frame 4 cannot move downwards under the effect of no external force, and the rolling prevention plate 59 can be supported at the left upper part of the steel net roll with certain force under the effect of the elastic telescopic columns 58, the steel mesh coil is unreeled in the anti-roll plate 59, the elastic telescopic columns 58 can extend in a matched mode, so that the anti-roll plate 59 can be attached to the outer side of the steel mesh coil all the time, and the unreeling stability of the steel mesh coil can be improved in a mode of limiting unreeling the steel mesh coil;
s4, steel mesh laying: the placing frame 4 can be moved downwards by manually pulling the pull rope at the bottom of the placing frame 4 downwards, the leveling press plate 63 can press the steel mesh on the hook-shaped part of the steel bar arranged on the side slope under the action of the extrusion elastic column 62, the steel mesh is in a stretched state through the extrusion force of the limiting roller 53, the guide sliding column 41 on the placing frame 4 can slide on the dovetail chute 31, and when the placing frame 4 moves to the lower end of the dovetail chute 31, the steel mesh can be laid;
when a certain length of the steel bar on the side slope is reserved, the follow-up column 64 is clamped on the guide boss 34, so that the leveling pressing plate 63 can move rightwards under the guide action of the guide boss 34 before the leveling pressing plate 63 is contacted with the steel bar, the steel bar cannot influence the movement of the leveling pressing plate 63, and when the follow-up column 64 is separated from the guide boss 34, the leveling pressing plate 63 can be pressed on the steel mesh again under the action of the extrusion elastic column 62; and binding the steel mesh on the steel bar through an iron wire, and performing concrete mortar spraying construction on the side slope after the steel mesh is completely laid.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A deep foundation pit supporting and reinforcing construction method adopts a deep foundation pit steel mesh laying device which comprises two upper support plates (1), connecting rods (2), guide plates (3), a placing frame (4) and a limiting mechanism (5), and is characterized in that one end of each upper support plate (1) is provided with an inserted rod (11), one end of the middle part of each upper support plate (1), which is close to the inserted rod (11), is connected through the connecting rods (2), the other end of each upper support plate (1) is provided with the guide plate (3) through a hinge, a dovetail chute (31) is arranged on the side surface of each guide plate (3), the placing frame (4) is positioned between the two guide plates (3), two ends of each placing frame (4) are provided with a guide sliding column (41), and each guide sliding column (41) is of an L-shaped structure, a dovetail sliding block in sliding fit with the dovetail sliding groove (31) is arranged at the transverse section of the guide sliding column (41), a groove is formed in the side edge, away from the guide plate (3), of the placing frame (4), and the limiting mechanism (5) is connected into the groove of the placing frame (4); wherein:
the placing frame (4) is of a square frame structure with an opening at the upper end; the limiting mechanism (5) comprises a rotating plate (51) which is arranged on the lower side wall of the groove on the placing frame (4) through a hinge, the upper end of the rotating plate (51) is clamped on the placing frame (4), a limiting elastic column (52) is connected to the rotating plate (51) in a sliding fit mode, a limiting roller (53) is arranged at one end, close to the guide plate (3), of the limiting elastic column (52) through a roller plate, and the limiting roller (53) abuts against the inner wall of one side, close to the guide plate (3), of the placing frame (4);
the lower end of the guide plate (3) is provided with a stable inserting column (32) for positioning the guide plate; the upper side surface of the rotating plate (51) is provided with an extrusion assembly (6); the extrusion assembly (6) comprises an extrusion support plate (61) arranged on the upper side surface of the rotating plate (51), an extrusion elastic column (62) is connected to the extrusion support plate (61) in a sliding fit mode, and a leveling press plate (63) is arranged at one end, close to the guide plate (3), of the extrusion elastic column (62); a pull rope is arranged at the bottom of the placing frame (4);
the construction method for supporting and reinforcing the deep foundation pit side slope by adopting the deep foundation pit steel mesh laying device comprises the following steps:
s1, slope finishing: after the foundation pit excavation construction is finished, carrying out leveling treatment on the foundation pit side slope, and removing pumice and grass root sundries on the side slope, so that the foundation pit side slope is in a basically flat state;
s2, steel bar anchoring: anchoring the steel bars on the slope to be reinforced at equal intervals, so that the steel bars can be stably inserted on the slope, and the outer ends of the steel bars are arranged into a hook shape;
s3, placing a steel net roll: after the steel bars on the side slope are anchored, the upper support plate (1) is locked on the ground at the upper end of the side slope through the insertion rods (11), the guide plate (3) is made to be lapped on the side face of the side slope, the guide plate (3) is inserted in the ground of the side slope through the stable insertion columns (32), then the rotating plate (51) is rotated towards the outer side of the placing frame (4), a steel mesh coil is placed in the placing frame (4), the free end of the steel mesh is locked at the position between the upper support plates (1), then the rotating plate (51) is clamped at the initial position of the placing frame (4), and the limiting rollers (53) can press the steel mesh on the inner wall, close to the guide plate (3), of the placing frame (4);
s4, steel mesh laying: place the stay cord of frame (4) bottom through artifical pulling downwards so that place frame (4) and can remove downwards, level and smooth clamp plate (63) can press the steel mesh on the crotch of the reinforcing bar of side slope setting under the effect of extrusion bullet post (62), the extrusion force through spacing roller (53) makes the steel mesh be in the state of tightening straight, direction traveller (41) on placing frame (4) can slide on forked tail spout (31), when placing the lower extreme that frame (4) removed forked tail spout (31), the steel mesh can be laid the ligature and accomplish, pass through the iron wire with the steel mesh again on the reinforcing bar, the steel mesh is whole to be laid the completion back, carry out the spraying construction of concrete mortar to the side slope.
2. The deep foundation pit supporting and reinforcing construction method according to claim 1, characterized in that: the two ends of the connecting rod (2) penetrate through the upper support plate (1), an inner pressure spring (12) is arranged on the outer end of the connecting rod (2), and the inner pressure spring (12) is installed between the outer end of the connecting rod (2) and the opposite side face of the upper support plate (1).
3. The deep foundation pit supporting and reinforcing construction method according to claim 2, characterized in that: the middle part of connecting rod (2) be connected with adjusting sleeve (13) through normal running fit's mode, connecting rod (2) are located the both ends of going up extension board (1) inboard and all are provided with the external screw thread, external screw thread opposite direction on connecting rod (2), all be connected with the top through screw-thread fit's mode on the external screw thread of connecting rod (2) and stretch cover (14), the back of the body end that stretches cover (14) on the top supports on the opposite flank of last extension board (1), the top is stretched and is connected through extending structure's arc (15) between cover (14) and adjusting sleeve (13), the middle part of direction traveller (41) be extending structure.
4. The deep foundation pit supporting and reinforcing construction method according to claim 1, characterized in that: the end face of the rotating plate (51) is provided with a locking slot (54), a positioning insertion column (55) is arranged in the locking slot (54), the positioning insertion column (55) penetrates through the placing frame (4), a U-shaped support (56) is arranged on the outer side of the end face of the placing frame (4), a sliding elastic column (57) is connected to the U-shaped support (56) in a sliding fit mode, and one end, corresponding to the placing frame (4), of the sliding elastic column (57) is connected with the positioning insertion column (55).
5. The deep foundation pit supporting and reinforcing construction method according to claim 1, characterized in that: the bottom of the roller plate is provided with a rolling prevention plate (59) through an elastic telescopic column (58), and the elastic telescopic column (58) is obliquely arranged.
6. The deep foundation pit supporting and reinforcing construction method according to claim 5, wherein: the anti-rolling plate (59) is of an arc-shaped structure, an arc-shaped groove is formed in the middle of the anti-rolling plate (59), unwinding rollers (591) are arranged in the arc-shaped groove of the anti-rolling plate (59) at equal intervals along the arc-shaped structure of the arc-shaped groove, and anti-blocking rollers (592) are arranged at the bottom of the anti-rolling plate (59).
7. The deep foundation pit supporting and reinforcing construction method according to claim 1, characterized in that: the side that levelly and smoothly clamp plate (63) correspond deflector (3) evenly is provided with the square groove along its length direction, the position that levels clamp plate (63) top groove is corresponding with the position of reinforcing bar on the side slope, the side upper end that places frame (4) and correspond rotor plate (51) be provided with the arc chamfer.
8. The deep foundation pit supporting and reinforcing construction method according to any one of claims 1 to 7, wherein: the side of deflector (3) on be provided with guide bracket (33) along its length direction, guide bracket (33) are gone up and are provided with guide protrusion (34) along its length direction equidistant, the interval between guide protrusion (34) equals with the interval of reinforcing bar on the side slope, be provided with on the side of deflector (3) is kept away from in flattening clamp plate (63) with guide protrusion (34) matched with follow-up post (64).
9. The deep foundation pit supporting and reinforcing construction method according to claim 8, wherein: follow-up post (64) be L type structure, the horizontal section of follow-up post (64) is located the outside of deflector (3), guide bulge (34) are the trapezium structure, follow-up post (64) correspond the side both ends of guide bulge (34) and all are provided with the chamfer.
10. The deep foundation pit supporting and reinforcing construction method according to claim 8, wherein: the upper end and the lower end of the guide plate (3) are provided with two groups of threaded holes, and the guide support (33) is installed on the threaded holes of the guide plate (3) through bolts.
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| DE3838628A1 (en) * | 1988-11-15 | 1990-05-17 | Horst Vogelsang | Device for laying material webs, in particular bitumen and/or plastic webs or the like |
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