CN113152457A - Inclined strut steel pipe multi-section type remote restraint bin grouting device and construction method thereof - Google Patents
Inclined strut steel pipe multi-section type remote restraint bin grouting device and construction method thereof Download PDFInfo
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- CN113152457A CN113152457A CN202110472125.4A CN202110472125A CN113152457A CN 113152457 A CN113152457 A CN 113152457A CN 202110472125 A CN202110472125 A CN 202110472125A CN 113152457 A CN113152457 A CN 113152457A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 229
- 239000010959 steel Substances 0.000 title claims abstract description 229
- 238000010276 construction Methods 0.000 title claims abstract description 12
- 239000011440 grout Substances 0.000 claims abstract description 38
- 239000002002 slurry Substances 0.000 claims abstract description 20
- 210000001503 joint Anatomy 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 38
- 238000005192 partition Methods 0.000 claims description 19
- 230000009471 action Effects 0.000 claims description 7
- 239000002689 soil Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 238000003892 spreading Methods 0.000 claims description 4
- 230000007480 spreading Effects 0.000 claims description 4
- 229910000639 Spring steel Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- Conveying And Assembling Of Building Elements In Situ (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a diagonal steel tube multi-section remote restraint bin grouting device and a construction method thereof, wherein the diagonal steel tube, an upper restraint bin section steel tube and a lower restraint bin section steel tube are sequentially connected from top to bottom; a grouting core pipe is fixedly arranged in the upper constraint bin section steel pipe, the upper end of the grouting core pipe is a grouting receiver, a grouting device is in matched butt joint with the grouting receiver, the lower end of the grouting core pipe is a grout outlet device, and the grout outlet device is communicated with the lower constraint bin section steel pipe; the pipe wall surfaces of the upper constraint bin section steel pipe and the lower constraint bin section steel pipe are respectively provided with a slurry outlet and are respectively sleeved with a bag. The invention has the advantages that: the grouting system can be repeatedly used; the grouting process is effectively simplified, and the grouting effect and the economic benefit of unit grout are improved; the fixed-point multi-section grouting can be realized as required; the economic benefit is improved in multiple ways, and the comprehensive effect is obvious.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a diagonal-bracing steel pipe multi-section type remote restraint cabin grouting device and a construction method thereof.
Background
In order to effectively improve the bearing capacity of the diagonal bracing steel pipe, a pre-buried grouting steel pipe and a single (double) air bag are generally adopted for grouting after a constraint bin is arranged at the corresponding position of the end part of the diagonal bracing steel pipe, or a grouting opening is arranged after the top of a port is plugged for direct grouting and the like. The various grouting processes all have the following defects:
grouting by embedding a grouting pipe: the plugging steel plate and the full-length grouting steel pipe cannot be reused, so that the engineering cost is increased; corresponding structures are manufactured on site, the operation environment is poor, and the construction quality is influenced; multi-section fixed-point grouting cannot be realized by virtue of a single grouting pipe; and the plugging steel plate and the grouting pipe have the possibility of flying out of the steel pipe to cause safety accidents under the action of high-pressure counter force.
Single (double) air bag grouting: although multi-section fixed-point grouting can be realized, the construction process is complex, auxiliary equipment or tools need to be added, the technical requirement is high, the operation difficulty is high, and the efficiency is low; the air bag is high in consumption and high in cost; and the airbag has the possibility of safety accidents caused by the flying-out of the steel pipe under the action of high-pressure counter force.
Grouting after the top of the steel pipe is plugged: multi-section fixed-point grouting cannot be realized; the corresponding structure is manufactured on site, the operation environment is poor, and the quality is easily influenced; the deflagration phenomenon can occur under high pressure due to large air allowance in the cavity of the steel pipe, and the safety accident can be easily caused by the flying-out of the plugging steel plate; a large amount of slurry is consumed in the cavity of the steel pipe, and the engineering cost is increased.
Disclosure of Invention
The invention aims to provide a diagonal bracing steel pipe multi-section remote restraint bin grouting device and a construction method thereof according to the defects of the prior art.
The purpose of the invention is realized by the following technical scheme:
an inclined strut steel tube multi-section remote restraint bin grouting device is characterized by comprising an inclined strut steel tube, an upper restraint bin section steel tube and a lower restraint bin section steel tube which are sequentially connected from top to bottom, wherein a grouting steel tube is arranged in the inclined strut steel tube, and the lower end of the grouting steel tube is provided with a grouting device; a grouting core pipe is fixedly arranged in the upper constraint bin section steel pipe, the upper end of the grouting core pipe is provided with a grouting receiver, the grouting device is in matched butt joint with the grouting receiver, the lower end of the grouting core pipe is provided with a grout outlet device, and the grout outlet device is communicated with the lower constraint bin section steel pipe; and the pipe wall surfaces of the upper constraint bin section steel pipe and the lower constraint bin section steel pipe are respectively provided with a slurry outlet and are respectively sleeved with a bag.
At least two centering and limiting devices are fixedly sleeved on the outer wall surface of the grouting steel pipe; the centering and limiting device comprises a locking base, support legs and guide wheels, the locking base is sleeved and fixed on the outer wall surface of the grouting steel pipe, a plurality of radially extending support legs are distributed on the locking base at intervals, the guide wheels are mounted at the outer end parts of the support legs, and the guide wheels are tightly attached to the inner wall surface of the inclined strut steel pipe; the locking base is provided with a through hole, the inner diameter of the through hole is smaller than the outer diameter of the grouting steel pipe, the through hole is in interference fit with the grouting steel pipe, the through hole is provided with a notch, and the notch extends to the outer wall surface of the locking base from the inner wall surface of the through hole.
The upper end part of the grouting steel pipe is provided with a grouting limiting and pressing device, one end of the grouting limiting and pressing device is fixedly connected with the inclined strut steel pipe, and the other end of the grouting limiting and pressing device is fixedly connected with the upper end part of the grouting steel pipe; the grouting limiting and pressing device comprises a locking ring, a jacking disc and a screw rod, the locking ring is sleeved on the outer wall surface of the grouting steel pipe and fastened, the jacking disc and the locking ring are coaxially arranged, the jacking disc is tightly pressed on the upper end surface of the inclined strut steel pipe, a plurality of long screw holes are formed in the jacking disc at intervals corresponding to the outer edge part of the inclined strut steel pipe, the screw rod penetrates through the long screw holes in the jacking disc, one end of the screw rod is fixedly connected with the jacking disc, and the other end of the screw rod is fixedly connected with the outer wall surface of the inclined strut steel pipe; the end part of the screw rod, which is connected with the outer wall surface of the inclined strut steel pipe, is provided with a hook, the outer wall surface of the inclined strut steel pipe is provided with a through hole, and the hook of the screw rod is hooked with the through hole.
The slip casting ware includes the body and the male joint of body tip, the male joint is the toper form.
And a circle of limiting ring and an O-shaped sealing ring are arranged on the outer wall surface of the junction position of the pipe body and the male connector.
Partition plates are respectively fixed on the inner wall surfaces of the upper port and the lower port of the upper constraint bin section steel pipe, the outer edge part of each partition plate is welded and fixed with the inner wall surface of the upper constraint bin section steel pipe, a central through hole is formed in the center of each partition plate, and a sleeve is fixedly arranged on each central through hole; the grouting core pipe comprises a core pipe body, the core pipe body sequentially penetrates through the sleeves on the partition plates at the upper end and the lower end of the upper constraint bin section steel pipe, the upper port of the core pipe body is the grouting receiver, the outer wall surface of the grouting receiver is provided with an upper flange part, and a spring is arranged between the flange part and the partition plate; the lower port of the core tube body is the pulp outlet device, the outer wall surface of the pulp outlet device is provided with a lower flange part, and a plurality of pulp outlet holes are arranged on the side wall surface of the pulp outlet device at intervals.
An upper check valve rubber sleeve is arranged on the sleeve at the upper end, one end of the upper check valve rubber sleeve is fixed on the sleeve at the upper end, and the other end of the upper check valve rubber sleeve is wrapped on the outer wall surface of the core tube body; the lower end of the sleeve is provided with a lower check valve rubber sleeve, the check valve rubber sleeves are distributed at the inner end and the outer end of the partition plate at the lower end, one end of each check valve rubber sleeve is fixed on the sleeve at the lower end, and the other end of each check valve rubber sleeve is wrapped on the outer wall surface of the core pipe body.
At least one limiting groove is formed in the outer wall surface of the upper portion of the core tube body, and the limiting groove is in a right-angled triangle shape; an inner groove is formed in the inner wall surface of the sleeve, a limiting elastic clamp in a right-angled triangle shape is hinged to the inner groove, and the limiting elastic clamp can enter the limiting groove in a matched mode so as to limit the core tube body vertically and downwards.
The upper end in the core pipe body is provided with an initial limiting clamp spring, the initial limiting clamp spring comprises a spring and a spring steel wire, wherein the two ends of the spring penetrate through the core pipe body outwards and extend into the sleeve.
A construction method related to any one of the inclined strut steel tube multi-section type remote restraint cabin grouting devices is characterized by comprising the following steps: (1) sleeving and fixing at least two centering and limiting devices on the outer wall surface of the grouting steel pipe, and installing a grouting device at the front end of the grouting steel pipe; (2) arranging a grouting core pipe in the upper constraint bin section steel pipe, and sequentially fixedly communicating the inclined strut steel pipe, the upper constraint bin section steel pipe and the lower constraint bin section steel pipe; (3) sinking the inclined strut steel pipe, the upper constraint bin section steel pipe and the lower constraint bin section steel pipe to a designed depth in a soil body; (4) the grouting steel pipe is guided by the centering and limiting device to penetrate into the bottom of the inclined strut steel pipe, so that the grouting device enters a grouting receiver at the upper end of the grouting core pipe, and a grout outlet on the side wall surface of the lower port of the grouting core pipe is positioned in the lower constraint bin section steel pipe; arranging a grouting limiting and pressing device at the upper end part of the grouting steel pipe, and enabling a hook at the end part of a screw rod of the grouting limiting and pressing device to be hooked with a through hole in the outer wall surface of the inclined strut steel pipe so as to limit the grouting steel pipe in the axial direction; (5) starting a grouting device to pump the slurry, enabling an initial limiting clamp spring to fall off, enabling the slurry to pass through the grouting steel pipe and the grouting core pipe, then spreading a check valve rubber sleeve wrapped on the outer wall surface through a slurry outlet hole in the wall surface at the lower end of the grouting core pipe, enabling the slurry to enter the lower constraint bin section steel pipe, continuing grouting until a bag on the lower constraint bin section steel pipe expands to the design requirement, and stopping grouting; (6) adjusting and loosening the grouting limiting and pressing device, rebounding the grouting core pipe under the reset action of the spring, clamping a limiting elastic card on the sleeve in a limiting groove of the grouting core pipe to limit the grouting core pipe in the axial direction, enabling a grout outlet hole in the side wall surface at the lower end of the grouting core pipe to be located in the upper constraint bin section steel pipe, and locking the grouting limiting and pressing device again; (7) starting a grouting device to pump grout, after the grout passes through the grouting steel pipe and the grouting core pipe, spreading the lower check valve rubber sleeve wrapped on the outer wall surface through a grout outlet hole on the wall surface at the lower end of the grouting core pipe so as to enable the grout to enter the upper constraint bin section steel pipe, and continuing grouting until a bag on the upper constraint bin section steel pipe expands to meet design requirements and then stopping grouting; (8) removing the grouting limiting and pressing device, and lifting the grouting steel pipe to leave the inclined strut steel pipe; (9) keeping the inclined strut steel pipe, the upper constraint bin section steel pipe and the lower constraint bin section steel pipe in a soil body, and filling and pouring concrete materials in the inclined strut steel pipe; (10) and fixedly connecting the upper end of the diagonal bracing steel pipe with the foundation pit surrounding purlin to form a foundation pit supporting body.
The invention has the advantages that: the industrialized and standardized production of related structural parts is realized, the assembly (installation) is rapidly carried out on site, and the product quality is ensured; the grouting system can be repeatedly used; the grouting process is effectively simplified, and the grouting effect and the economic benefit of unit grout are improved; can realize fixed-point multi-section (including single point) grouting according to the requirement; the economic benefit is improved in multiple ways, and the comprehensive effect is obvious.
Drawings
FIG. 1 is a schematic structural view of a diagonal-bracing steel-tube multi-section type remote restraint cabin grouting device in the invention;
FIG. 2 is a schematic structural view of a grouting core pipe according to the present invention;
FIG. 3 is a schematic diagram of the cooperation between a grouting steel pipe lower end grouting device and a grouting core pipe upper end grouting receiver in the invention;
FIG. 4 is a schematic view of the structure of the lower end of the grouting core tube according to the present invention;
FIG. 5 is a schematic view of the state change of the position-limiting elastic card shown in FIG. 3;
FIG. 6 is a schematic structural view of a grouting limiting and pressing device according to the present invention;
FIG. 7 is a schematic plan view of the capping plate of the present invention;
FIG. 8 is a schematic view of the locking ring of the present invention;
FIG. 9 is a schematic structural view of the centering and limiting device according to the present invention;
FIG. 10 is a schematic view of a notch in the locking base of the present invention;
FIG. 11 is a schematic view of the locking type remote restraint bin grouting device at the top of the diagonal bracing steel pipe applied to the outer side of the foundation pit support structure;
fig. 12 is a schematic view of the locking type remote restraint bin grouting device at the top of the diagonal bracing steel pipe applied to the inner side of the foundation pit support structure.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:
referring to fig. 1-12, the symbols in the drawings are: the grouting limiting and pressing device comprises a grouting limiting and pressing device 1, a centering limiting device 2, a grouting steel pipe 3, an inclined strut steel pipe 4, an upper constraint bin section steel pipe 5, a grouting core pipe 6, a bag 7, a bag 8, a lower constraint bin section steel pipe 9, a spring 10, a partition plate 11, a sleeve 12, an initial limiting clamp spring 13, an upper check valve rubber sleeve 14, a core pipe body 15, a lower check valve rubber sleeve 16, a grout outlet hole 17, a grouting device 18, a grouting pipe body 19, a limiting ring 20, an O-shaped sealing ring 21, a male connector 22, a grouting receiver 23, an air-water separator 24, a limiting groove 25, an inner groove 26, a limiting elastic clamp 27, a jacking disc 28, a locking ring 29, a screw 30, a nut 31, a through hole 32, a hook 33, a long screw hole 34, a central hole 35, a semicircular ring 36, a locking base 37, a spring group 38, a support leg 39, a guide wheel 40, a bolt 41, a notch 42, a surrounding purlin 43 and a surrounding structure 44.
Example (b): as shown in fig. 1-12, the present embodiment specifically relates to a diagonal steel tube multi-section remote restraint bin grouting device and a construction method thereof, the device includes a diagonal steel tube 4, an upper restraint bin section steel tube 5 and a lower restraint bin section steel tube 9 which are sequentially connected from top to bottom, a grouting steel tube 3 is arranged in the diagonal steel tube 4, a grouting device 18 is arranged at the lower end of the grouting steel tube 3, a grouting receiver 23 is arranged at the upper end of a grouting core tube 6, the grouting device 18 is in butt joint with the grouting receiver 23 in a matching manner, a grout outlet is arranged at the lower end of the grouting core tube 6, and the grout outlet is communicated with the lower restraint bin section steel tube 9; the pipe wall surfaces of the upper constraint bin section steel pipe 5 and the lower constraint bin section steel pipe 9 are respectively provided with a slurry outlet and are respectively sleeved with a bag 7.
As shown in fig. 1, an inclined strut steel pipe 4, an upper constraint bin section steel pipe 5 and a lower constraint bin section steel pipe 9 are coaxially connected, a plurality of slurry outlet holes are formed in the pipe wall surface of the upper constraint bin section steel pipe 5, a bag 7 is fixedly arranged on the outer wall surface of the upper constraint bin section steel pipe 5 through a buckle, and each slurry outlet hole is located in the wrapping area of the bag 7; similarly, a plurality of grout outlet holes are formed in the wall surface of the lower constraint bin section steel pipe 9, the outer wall surface of the lower constraint bin section steel pipe 9 is fixedly provided with the bag 7 through a buckle, and each grout outlet hole is located in the wrapping area of the bag 7.
As shown in fig. 1-5, the front end of the grouting steel pipe 3 is a grouting device 18, the grouting device 18 includes a grouting pipe 19 and a male joint 22, a limiting ring 22 protruding outwards is arranged at the boundary position of the grouting pipe 19 and the outer wall surface of the male joint 22, an O-ring seal 21 is arranged on the limiting ring 22, and the limiting ring 22 and the O-ring seal 21 are used as sealing members when the grouting device 18 is communicated with a grouting receiver 23.
As shown in fig. 1-5, a grouting core tube 6 is arranged in the upper restraint bin section steel tube 5, the main body of the grouting core tube 6 is a core tube body 15, the upper end of the core tube body 15 is a grouting receiver 23, the lower end is a grout outlet (not marked in the figures), partition plates 11 are respectively fixed on the inner wall surfaces of the upper port and the lower port of the upper restraint bin section steel tube 5, the outer edge part of each partition plate 11 is welded and fixed with the inner wall surface of the upper restraint bin section steel tube 5, a central through hole is arranged in the center of each partition plate 11, a sleeve 12 is coaxially arranged on each central through hole, the core tube body 15 penetrates through the central through holes of the partition plates 11 at the upper end and the lower end and the sleeve 12, the core tube body 14 is in slidable fit with the inner wall surface of the sleeve 12, an upper check valve rubber sleeve 14 is sleeved on the sleeve 12 at the upper portion, one end of the upper check valve rubber sleeve 14 is fixedly connected with the outer wall surface of the sleeve 12, the other end of the core-tightening pipe body 14 is wrapped under the action of elastic force, so that slurry is prevented from entering a sliding gap between the core-tightening pipe body and the grouting pipe body in the grouting process; the upper end opening of the core tube body 15 has a convex flange portion, and a spring 10 is coaxially fitted between the flange portion and the upper end partition plate 11, and when the male tab 22 is inserted into the core tube body 15, the O-ring seal 21 and the stopper ring 20 abut against the flange portion of the upper end opening of the core tube body 15 and press it down into sealing contact, and the spring 10 is also compressed. The lower end of the core tube body 15 is a grout outlet, a circle of grout outlet holes 17 are formed in the lower end of the core tube body 15, the lower end of the core tube body 15 penetrates through the sleeve 12 and the partition plate 11, a lower check valve rubber sleeve 16 is arranged on the sleeve 12, one end of the lower check valve rubber sleeve 16 is fixed between the sleeve 12 and the other end of the lower check valve rubber sleeve wraps the outer wall surface of the lower end of the core tube body 15 tightly, and when the grout outlet 18 is in contact with the upper end of the core tube body 15 but is not pressed downwards, the grout outlet holes 17 in the lower end of the core tube body 15 are located in the upper restraint bin section steel tube 5; when the grouting device 18 contacts with the upper end of the core tube body 15 and presses the spring 10 downwards, the grout outlet 17 at the lower end of the core tube body 15 is positioned in the lower restraint bin section steel tube 9. When grouting, the grout can open the lower check valve rubber sleeve 14 and perform grouting into the corresponding constraint bin section steel pipe, and further overflows to the bag 7 to form an expanded body.
It should be noted that, as shown in fig. 3 and 5, an initial limiting snap spring 13 is disposed at the upper end of the core tube body 15, the initial limiting snap spring 13 includes a spring and a spring steel wire extending into the sleeve 12 from the two ends of the spring to the outside through the core tube body 15, and the initial limiting snap spring 13. The initial limiting clamp spring 13 can bear a certain downward pressure and ensure that the position of the core tube body 15 is fixed. In addition, at least one limiting groove 25 is arranged on the outer wall surface of the upper part of the core tube body 15, and the limiting groove 25 is in a right-angled triangle shape; an inner groove 26 is formed in the inner wall surface of the sleeve 12, a limiting elastic clamp 27 in a right-angled triangular shape is hinged in the inner groove 26, and the limiting elastic clamp 27 can be matched with the limiting groove 25 to limit the core tube body 15 vertically downwards. Fig. 5 is a schematic diagram showing the state change of the two limit matches.
As shown in fig. 1-10, in the process that the grouting steel pipe 3 is inserted into the bracing steel pipe 4, centering and limiting guidance is performed by means of at least two centering and limiting devices 2, each centering and limiting device 2 mainly comprises a locking base 37, a leg 39 and a guide wheel 40, a through hole is formed in the center of the locking base 37, and the through hole is used for enabling the locking base 37 to be sleeved and fixed on the outer wall surface of the grouting steel pipe 3, so that the inner diameter of the through hole of the locking base 37 is slightly smaller than the outer diameter of the grouting steel pipe 3, and the locking base 37 and the grouting steel pipe 3 can form an interference fit to ensure the tightness between the locking base and the locking base, and it should be noted that a notch 42 is formed in the locking base 37, and the notch 42 extends from the inner wall of the through hole to the outer wall surface of the locking base 37, so that the locking base 37 has a certain resilience, and can be expanded by an external force when being sleeved on the grouting steel pipe 3, and can be shrunk and fastened on the outer wall surface of the grouting steel pipe 3 after the sheathing is finished. Four sets of bolt holes are formed in the outer edge of the upper surface of the lock base 37 at intervals, and accordingly, the legs 39 are correspondingly mounted at the positions of the bolt holes and fastened by bolts 41, so that the legs 39 are fixedly connected with the lock base 37. Each support leg 39 is respectively arranged along the radial direction of the inclined strut steel tube 4, a guide wheel 40 is fixed at the outer end part of each support leg 39, each guide wheel 40 is composed of a plurality of pulleys and is vertically arranged, so that the locking base 37 can vertically move in the inclined strut steel tube 4, and a spring group 38 is arranged between the outer end part of each support leg 39 and each guide wheel 40, and the guide wheels 40 can be always in close contact with the inner wall surface of the inclined strut steel tube 4 under the action of compression resilience force through the arrangement of the spring group 38.
As shown in fig. 1-10, when the grouting device 18 and the grouting receiver 23 are butted and grouting is performed, recoil force is generated, so that the grouting steel pipe 3 needs to be axially limited, and therefore, a grouting limit pressing device 1 is arranged at the tail end of the grouting steel pipe 3 to be connected and fixed with the bracing steel pipe 4. The grouting limiting and pressing device 1 mainly comprises a locking ring 29 and a pressing top disc 28, wherein the locking ring 29 is composed of two semicircular rings 36, and the locking ring 29 is sleeved on the outer wall surface of the tail end of the grouting steel pipe 3 and is screwed and fixed through a bolt to enable the locking ring 29 and the grouting steel pipe 3 to be integrated. The vertical section of the locking ring 29 is in a boss shape, the center of the top pressing disc 28 is provided with a center hole 35, the center hole 35 of the top pressing disc 28 is coaxially sleeved on the boss surface of the locking ring 29, and as shown in fig. 5, after the position of the top pressing disc 28 is fixed, the locking ring 29 can be limited in the axial direction. The outer diameter of the top pressing disc 28 is larger than that of the inclined strut steel tube 4, so that the top pressing disc 28 can be tightly pressed on the upper end surface of the inclined strut steel tube 4, a plurality of long screw holes 34 are arranged at intervals on the top pressing disc 28 at positions corresponding to the outer edge of the inclined strut steel tube 4, as shown in fig. 7, each long screw hole 34 is arranged along the radial direction of the top pressing disc 28, the screw rods 30 vertically penetrate through the long screw holes 34, through holes 35 are arranged on the outer wall surface of the upper end part of the inclined strut steel pipe 4 corresponding to the long screw holes 34, the screw rods 30 are adjusted to be arranged close to the outer wall surface of the inclined strut steel pipe 4 in the long screw holes 34, the hook 33 at the lower end of the screw rod 30 is inserted into the through hole 32 to form a hook connection with the screw rod, and furthermore, the upper end of the screw 30 is screwed by the nut 31, so that the screw 30 forms a tight fixed connection relationship between the top pressing disc 28 and the inclined strut steel tube 4, that is, the top pressing disc 28 is limited and fixed in the axial direction of the inclined strut steel tube 4.
As shown in fig. 1 to 12, the construction method of the multi-section remote confined bin grouting device of the inclined strut steel tube in this embodiment includes the following steps:
(1) at least two centering and limiting devices 2 are fixedly sleeved on the outer wall surface of the grouting steel pipe 3, and a grouting device 18 is arranged at the front end of the grouting steel pipe 3.
(2) And a grouting core pipe 6 is arranged in the upper restraint bin section steel pipe 5, and the fixed communication among the inclined strut steel pipe 4, the upper restraint bin section steel pipe 5 and the lower restraint bin section steel pipe 9 is completed in sequence.
(3) And (3) sinking the inclined strut steel pipe 4, the upper constraint bin section steel pipe 5 and the lower constraint bin section steel pipe 9 to the designed depth in the soil body.
(4) The grouting steel pipe 3 is guided by the centering and limiting device 2 to extend into the bottom of the diagonal bracing steel pipe 4, so that the grouting device 18 enters the grouting receiver 23 at the upper end of the grouting core pipe 6, and the grout outlet 17 on the side wall surface of the lower port of the grouting core pipe 6 is positioned in the lower constraint bin section steel pipe 9; the upper end part of the grouting steel pipe 3 is provided with the grouting limiting and pressing device 1, and a hook 33 at the lower end part of a screw 30 of the grouting limiting and pressing device 1 is hooked with a through hole 32 on the outer wall surface of the inclined strut steel pipe 4, so that the grouting steel pipe 3 is limited in the axial direction.
(5) And starting the grouting device to pump the slurry, enabling the initial limiting clamp spring 13 to fall off, and after the slurry passes through the grouting steel pipe 3 and the grouting core pipe 6, opening a lower check valve rubber sleeve 16 wrapped on the outer wall surface through a slurry outlet hole 17 on the wall surface at the lower end of the grouting core pipe 6 so as to enable the slurry to enter the lower constraint bin section steel pipe 9, and continuing grouting until the bag 7 on the lower constraint bin section steel pipe 9 expands to the design requirement, and then stopping grouting.
(6) And adjusting the loosening grouting limiting and pressing device 1, rebounding the grouting core pipe 6 under the reset action of the spring 10, clamping the limiting elastic clamp 27 on the sleeve 12 in the limiting groove 25 to limit the grouting core pipe axially, positioning the grout outlet 17 on the side wall surface at the lower end of the grouting core pipe 6 in the upper constraint bin section steel pipe 5, and locking the grouting limiting and pressing device 1 again.
(7) And (3) starting a grouting device to pump the slurry, after the slurry passes through the grouting steel pipe 3 and the grouting core pipe 6, expanding a lower check valve rubber sleeve 16 wrapped on the outer wall surface through a slurry outlet hole 17 on the wall surface at the lower end of the grouting core pipe 6 so as to enable the slurry to enter the upper constraint bin section steel pipe 5, and continuously grouting until the bag 7 on the upper constraint bin section steel pipe 5 expands to the design requirement and then stopping grouting.
(8) And (3) removing the grouting limiting and pressing device 1, and lifting the grouting steel pipe 3 to leave the inclined strut steel pipe 4.
(9) The stayed inclined strut steel pipe 4, the upper constraint bin section steel pipe 5 and the lower constraint bin section steel pipe 9 are arranged in a soil body, and concrete materials are filled and poured in the inclined strut steel pipe 4.
(10) And fixedly connecting the upper end of the diagonal bracing steel pipe 4 with an enclosing purlin 43 on a foundation pit enclosing structure 44 to form a foundation pit supporting body.
Claims (10)
1. An inclined strut steel tube multi-section remote restraint bin grouting device is characterized by comprising an inclined strut steel tube, an upper restraint bin section steel tube and a lower restraint bin section steel tube which are sequentially connected from top to bottom, wherein a grouting steel tube is arranged in the inclined strut steel tube, and the lower end of the grouting steel tube is provided with a grouting device; a grouting core pipe is fixedly arranged in the upper constraint bin section steel pipe, the upper end of the grouting core pipe is provided with a grouting receiver, the grouting device is in matched butt joint with the grouting receiver, the lower end of the grouting core pipe is provided with a grout outlet device, and the grout outlet device is communicated with the lower constraint bin section steel pipe; and the pipe wall surfaces of the upper constraint bin section steel pipe and the lower constraint bin section steel pipe are respectively provided with a slurry outlet and are respectively sleeved with a bag.
2. The multi-section remote restraint bin grouting device for the steel tube with the inclined struts according to claim 1, wherein at least two centering and limiting devices are fixedly sleeved on the outer wall surface of the grouting steel tube; the centering and limiting device comprises a locking base, support legs and guide wheels, the locking base is sleeved and fixed on the outer wall surface of the grouting steel pipe, a plurality of radially extending support legs are distributed on the locking base at intervals, the guide wheels are mounted at the outer end parts of the support legs, and the guide wheels are tightly attached to the inner wall surface of the inclined strut steel pipe; the locking base is provided with a through hole, the inner diameter of the through hole is smaller than the outer diameter of the grouting steel pipe, the through hole is in interference fit with the grouting steel pipe, the through hole is provided with a notch, and the notch extends to the outer wall surface of the locking base from the inner wall surface of the through hole.
3. The multi-section remote confined bin grouting device of an inclined strut steel tube as claimed in claim 1, wherein the upper end of the grouting steel tube is provided with a grouting limiting and pressing device, one end of the grouting limiting and pressing device is fixedly connected with the inclined strut steel tube, and the other end of the grouting limiting and pressing device is fixedly connected with the upper end of the grouting steel tube; the grouting limiting and pressing device comprises a locking ring, a jacking disc and a screw rod, the locking ring is sleeved on the outer wall surface of the grouting steel pipe and fastened, the jacking disc and the locking ring are coaxially arranged, the jacking disc is tightly pressed on the upper end surface of the inclined strut steel pipe, a plurality of long screw holes are formed in the jacking disc at intervals corresponding to the outer edge part of the inclined strut steel pipe, the screw rod penetrates through the long screw holes in the jacking disc, one end of the screw rod is fixedly connected with the jacking disc, and the other end of the screw rod is fixedly connected with the outer wall surface of the inclined strut steel pipe; the end part of the screw rod, which is connected with the outer wall surface of the inclined strut steel pipe, is provided with a hook, the outer wall surface of the inclined strut steel pipe is provided with a through hole, and the hook of the screw rod is hooked with the through hole.
4. The apparatus of claim 1, wherein the grouting device comprises a tube body and a male joint at an end of the tube body, and the male joint is in a conical shape.
5. The multi-section remote confined bin grouting device of an inclined strut steel tube as claimed in claim 4, wherein a circle of limiting ring and O-shaped sealing ring are arranged on the outer wall surface of the junction position of the tube body and the male joint.
6. The multi-section remote restraint bin grouting device of an inclined strut steel tube as claimed in claim 4, wherein partition plates are respectively fixed on the inner wall surfaces of the upper end opening and the lower end opening of the upper restraint bin section steel tube, the outer edge part of each partition plate is welded and fixed with the inner wall surface of the upper restraint bin section steel tube, a central through hole is formed in the center of each partition plate, and a sleeve is fixedly arranged on each central through hole; the grouting core pipe comprises a core pipe body, the core pipe body sequentially penetrates through the sleeves on the partition plates at the upper end and the lower end of the upper constraint bin section steel pipe, the upper port of the core pipe body is the grouting receiver, the outer wall surface of the grouting receiver is provided with an upper flange part, and a spring is arranged between the flange part and the partition plate; the lower port of the core tube body is the pulp outlet device, the outer wall surface of the pulp outlet device is provided with a lower flange part, and a plurality of pulp outlet holes are arranged on the side wall surface of the pulp outlet device at intervals.
7. The multi-section remote restraint bin grouting device for the steel tube with the inclined struts according to claim 6, characterized in that an upper check valve rubber sleeve is arranged on the sleeve at the upper end, one end of the upper check valve rubber sleeve is fixed on the sleeve at the upper end, and the other end of the upper check valve rubber sleeve is wrapped on the outer wall surface of the core tube body; the lower end of the sleeve is provided with a lower check valve rubber sleeve, the check valve rubber sleeves are distributed at the inner end and the outer end of the partition plate at the lower end, one end of each check valve rubber sleeve is fixed on the sleeve at the lower end, and the other end of each check valve rubber sleeve is wrapped on the outer wall surface of the core pipe body.
8. The multi-section remote confined bin grouting device of an inclined strut steel tube as claimed in claim 6, wherein at least one limiting groove is formed on the outer wall surface of the upper part of the core tube body, and the limiting groove is in a right triangle shape; an inner groove is formed in the inner wall surface of the sleeve, a limiting elastic clamp in a right-angled triangle shape is hinged to the inner groove, and the limiting elastic clamp can enter the limiting groove in a matched mode so as to limit the core tube body vertically and downwards.
9. The multi-section remote confined bin grouting device of claim 6, wherein an initial limit clamp spring is disposed at the upper end of the core tube body, and the initial limit clamp spring comprises a spring and a spring steel wire extending from the two ends of the spring to the outside through the core tube body and into the sleeve.
10. A construction method involving the bracing steel pipe multi-section type remote restraint cabin grouting device of any one of claims 1 to 9, characterized in that the construction method comprises the following steps: (1) sleeving and fixing at least two centering and limiting devices on the outer wall surface of the grouting steel pipe, and installing a grouting device at the front end of the grouting steel pipe; (2) arranging a grouting core pipe in the upper constraint bin section steel pipe, and sequentially fixedly communicating the inclined strut steel pipe, the upper constraint bin section steel pipe and the lower constraint bin section steel pipe; (3) sinking the inclined strut steel pipe, the upper constraint bin section steel pipe and the lower constraint bin section steel pipe to a designed depth in a soil body; (4) the grouting steel pipe is guided by the centering and limiting device to penetrate into the bottom of the inclined strut steel pipe, so that the grouting device enters a grouting receiver at the upper end of the grouting core pipe, and a grout outlet on the side wall surface of the lower port of the grouting core pipe is positioned in the lower constraint bin section steel pipe; arranging a grouting limiting and pressing device at the upper end part of the grouting steel pipe, and enabling a hook at the end part of a screw rod of the grouting limiting and pressing device to be hooked with a through hole in the outer wall surface of the inclined strut steel pipe so as to limit the grouting steel pipe in the axial direction; (5) starting a grouting device to pump the grout, enabling an initial limiting clamp spring to fall off, enabling the grout to pass through the grouting steel pipe and the grouting core pipe, then spreading a lower check valve rubber sleeve wrapped on the outer wall surface through a grout outlet hole in the wall surface at the lower end of the grouting core pipe so as to enable the grout to enter the lower constraint bin section steel pipe, and continuing grouting until a bladder on the lower constraint bin section steel pipe expands to meet design requirements and then stopping grouting; (6) adjusting and loosening the grouting limiting and pressing device, rebounding the grouting core pipe under the reset action of the spring, clamping a limiting elastic card on the sleeve in a limiting groove of the grouting core pipe to limit the grouting core pipe in the axial direction, enabling a grout outlet hole in the side wall surface at the lower end of the grouting core pipe to be located in the upper constraint bin section steel pipe, and locking the grouting limiting and pressing device again; (7) starting a grouting device to pump grout, after the grout passes through the grouting steel pipe and the grouting core pipe, spreading the lower check valve rubber sleeve wrapped on the outer wall surface through a grout outlet hole on the wall surface at the lower end of the grouting core pipe so as to enable the grout to enter the upper constraint bin section steel pipe, and continuing grouting until a bag on the upper constraint bin section steel pipe expands to meet design requirements and then stopping grouting; (8) removing the grouting limiting and pressing device, and lifting the grouting steel pipe to leave the inclined strut steel pipe; (9) keeping the inclined strut steel pipe, the upper constraint bin section steel pipe and the lower constraint bin section steel pipe in a soil body, and filling and pouring concrete materials in the inclined strut steel pipe; (10) and fixedly connecting the upper end of the diagonal bracing steel pipe with the foundation pit surrounding purlin to form a foundation pit supporting body.
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| CN202110472125.4A CN113152457B (en) | 2021-04-29 | 2021-04-29 | Inclined strut steel pipe multi-section type remote constraint bin grouting device and construction method thereof |
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| CN113152457B (en) | 2024-05-28 |
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