CN112502178A - Modular pipe jacking well construction equipment and use method - Google Patents
Modular pipe jacking well construction equipment and use method Download PDFInfo
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- CN112502178A CN112502178A CN202010960481.6A CN202010960481A CN112502178A CN 112502178 A CN112502178 A CN 112502178A CN 202010960481 A CN202010960481 A CN 202010960481A CN 112502178 A CN112502178 A CN 112502178A
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- 238000003825 pressing Methods 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000011449 brick Substances 0.000 abstract description 11
- 238000007789 sealing Methods 0.000 description 14
- 239000002689 soil Substances 0.000 description 14
- 238000007569 slipcasting Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C25/00—Cranes not provided for in groups B66C17/00 - B66C23/00
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
- E02D23/08—Lowering or sinking caissons
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- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to the technical field of open caisson, in particular to modular pipe jacking well construction equipment and a using method thereof, wherein the equipment comprises a pressure sinking device, a lifting device and a prefabricated sectional type open caisson, wherein the lifting device comprises: adjustable counter-force seat, location support piece, driving rope and drive disk assembly, counterweight, prefabricated sectional type open caisson include a plurality of open caisson rings and be located the lower floor the base ring of open caisson ring bottom, the inboard of base ring be equipped with the inner groovy to be used for the cooperation to connect the bottom plate structure. Compared with the prior art, the invention can adopt a small-stroke jack in the open caisson process by arranging the lifting equipment, so that the height of the upright post of the reaction frame is reduced, and the size of the reaction frame is reduced; the prefabricated sectional type open caisson can solve the problem of wrong installation when an operator assembles, and the module is assembled quickly and conveniently; the later stage that the steelframe that the solution traditional portal adopted and brick masonry structure brought needs artifical broken away the process.
Description
Technical Field
The invention relates to the technical field of open caisson, in particular to modular pipe jacking well construction equipment and a using method thereof.
Background
The sectional type pressure sinking is a new open caisson construction method, and adopts a construction process of manufacturing a well section by sections and sinking by sections. The height of each well section is 1.0-1.5 m generally, and compared with the traditional open caisson manufacturing, the sectional open caisson does not need to erect a scaffold and a large vertical template in the well section manufacturing process, so that the construction speed is accelerated, and high-altitude operation is reduced.
The traditional segmental type pressure sinking device generally adopts a high-strength reaction frame, a jack with a stroke of 1.0-1.5 meters is reversely arranged on a beam of the reaction frame, and when the open caisson is constructed in a sinking mode, soil is taken out while a well section is pressed into the ground through the thrust of the jack. This kind of traditional pressure and sink device, because the total stroke that well section preparation height had decided once to push down must satisfy 1 ~ 1.5 meters, if the stroke of jack self is 1 ~ 1.5 meters, the reaction frame height is more than 4 meters, and the size is big, and the dead weight is heavy, the transportation difficulty, and because the mounting height is too high, when long arm motor-pumped underground borrowing, often can influence its operation, reduces its efficiency, the problem is urgent to be solved.
In addition, when the domestic pipe jacking well is constructed at present, the combination form of a grid steel frame and a brick masonry is mainly adopted at the position of the entrance and exit portal, and the portal surface is plastered and waterproof. When the push pipe enters and exits the hole, the steel frame and the brick masonry of the hole door are manually broken, so that the push pipe machine can enter and exit the hole. However, the method has great hidden danger that if the soil body reinforcement measure outside the portal is invalid or the reinforcement measure is not good, the phenomena of water gushing, sand gushing and mud gushing can be caused when the portal is broken, and great potential safety hazard and quality accidents are caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides the modular push pipe well construction equipment and the using method thereof, and realizes a better modular push pipe well construction effect.
In order to realize the above purpose, a modularized pipe jacking well construction device is designed, which comprises a pressure sinking device, a lifting device and a prefabricated assembling sectional type sinking well, wherein the lifting device comprises: the adjustable counter-force seat is used for connecting the pressure-sinking equipment and is provided with a connecting part; the positioning support piece is provided with a plurality of matching parts which are sequentially arranged from top to bottom and used for matching with the connecting part to position and support the adjustable counter-force seat; the transmission rope is connected with the adjustable counter-force seat and comprises a reverse section, and the motion direction of the transmission rope is adjusted to be the reverse direction of the motion direction of the adjustable counter-force seat by the transmission part at the reverse section; the counterweight part is connected with the reverse section of the transmission rope so as to balance the gravity of the adjustable counter-force seat; the prefabricated sectional type open caisson comprises a plurality of open caisson rings and a base ring positioned at the bottom of the open caisson ring at the lowermost layer, wherein an inner groove is formed in the inner side of the base ring and used for being matched with a connecting bottom plate structure.
One side of prefabricated sectional type open caisson is equipped with the trompil in order as the portal, trompil department evenly be equipped with a plurality of bolt holes along circumference to be used for connecting the splice bar that fibre reinforced composite made, the splice bar pour through cement and seal the portal.
The sinking ring is composed of a plurality of groups of assembly units which are connected end to end, each assembly unit comprises two assembly modules, the vertical sections of the assembly modules are in a right trapezoid shape, one end of each assembly module is a straight waist end, the other end of each assembly module is an inclined waist end, the two assembly modules of the same assembly unit are mutually attached through the inclined waist ends, the two adjacent assembly units are mutually attached through the straight waist ends of the assembly modules, the outer sides of the two ends of each assembly module are respectively provided with a first installation groove, a first arc-shaped hole is arranged in each first installation groove, the first arc-shaped holes of the adjacent assembly modules are mutually connected to form a first connection hole, and the first connection holes are matched with the arc-shaped connecting pieces to realize the splicing of the adjacent assembly modules; the vertical splicing of a plurality of layers of open caisson rings, wherein vertical connecting holes are correspondingly arranged between two adjacent layers of open caisson rings and are used for connecting vertical screw rods so as to realize the splicing of the upper and lower layers of open caisson rings.
The substrate ring is composed of a plurality of substrate modules which are connected end to end, second mounting grooves are respectively formed in the outer sides of two ends of each substrate module, second arc-shaped holes are formed in the second mounting grooves, and the second arc-shaped holes of the adjacent substrate modules are mutually connected to form second connecting holes which are used for being matched with the arc-shaped connecting pieces to realize the splicing of the adjacent substrate modules; the outer diameter of the base ring is larger than that of the sinking well ring, a grouting hole is formed in the base ring, one end of the grouting hole is connected with a vertical grouting hole of the sinking well ring, the other end of the grouting hole is located at the upper end of the outer side of the sinking well ring, and the other end of the grouting hole is not covered by the sinking well ring.
The adjustable counter-force seat is movably matched and connected with a pin shaft, the positioning support piece comprises a stand column, and a plurality of through holes are sequentially formed in the stand column from top to bottom and are used for being matched with the pin shaft.
The rear side of the reverse section of the transmission rope is also provided with a forward section, and the motion direction of the transmission rope is adjusted to the forward direction at the forward section through the transmission part.
The transmission component comprises a guide head sheave arranged on the upper side of the positioning support piece and is used for adjusting the motion direction of the transmission rope to the direction opposite to the motion direction of the adjustable counter-force seat.
The transmission component comprises a guide ground wheel arranged on the lower side of the guide head sheave and is used for adjusting the movement direction of the forward section of the transmission rope back to the forward direction.
The transmission component comprises a guide land wheel used for adjusting the movement direction of the forward section of the transmission rope back to the forward direction.
The invention also relates to a using method of the lifting device for the sectional type pressure-sinking equipment, which comprises the following steps: assembling a layer of the prefabricated sectional type open caisson, performing pressure sinking on the layer-changed prefabricated sectional type open caisson through pressure sinking equipment, after sinking to a specified position, assembling the layer of the prefabricated sectional type open caisson, connecting two layers of the prefabricated sectional type open caisson which are adjacent up and down through longitudinal steel bars, and performing pressure sinking on the layer of the prefabricated sectional type open caisson through the pressure sinking equipment to complete the pressure sinking of the whole prefabricated sectional type open caisson; in the process of pressing and sinking, after the pressing and sinking equipment presses and sinks in place, the matching of the connecting part and the matching part is removed, a downward movement stroke is applied through the forward section, so that the transmission rope drives the adjustable counter-force seat to move downwards to the position of the next matching part, and then the positioning and the supporting of the adjustable counter-force seat are realized through the matching of the connecting part and the matching part, and the subsequent pressing and sinking are carried out.
Advantageous effects of the invention
Compared with the prior art, the invention can adopt a small-stroke jack to reduce the height of the upright post of the reaction frame and reduce the size of the reaction frame by arranging the lifting equipment in the open caisson process, effectively solves the problems that the traditional sectional type pressure-sinking device has large volume, heavy weight and total height and influences the underground soil taking efficiency, and has the advantages that: the combined assembly is adopted, and all components are connected in a matched manner by bolts, so that the assembly and disassembly are convenient, and the replacement of parts is convenient; the height of the upright post is reduced, and equipment installation and underground soil taking operation are facilitated; the equipment can be quickly disassembled and is convenient to transport; adopt and to increase and decrease the design of adjusting the balancing weight, when the counter-force seat promoted, can reduce intensity of labour.
And moreover, the prefabricated assembly sectional type open caisson is adopted, the standard modules are manufactured in a factory rapid prefabrication mode, the prefabricated assembly modules and the base modules are consistent in structural form, prefabricated templates are less in investment, the adjacent modules are placed upside down during installation, the problem of wrong installation during assembly of operators can be solved, and the modules are rapid and convenient to assemble. Meanwhile, the adjacent modules are connected by adopting arc-shaped pull rods, the nuts are screwed in the mounting grooves on the outer wall of the open caisson, the construction safety problem of the installation of operators in the open caisson can be solved, the adjacent modules adopt double waterproof and anticorrosion structures, and compared with a common prefabricated open caisson single-channel waterproof or waterproof-free structure, the open caisson has better waterproof and anticorrosion effects, and the open caisson has the following advantages that: the structure is simple, and the installation and the operation are convenient; by adopting the invention, the investment of the template of a prefabrication manufacturer is less, the prefabrication speed is high, and the economic cost is low; the invention has better waterproof and anticorrosion effects, and meets the waterproof requirement in the open caisson construction process; by adopting the invention, each contact surface can be tightly attached, and the installation precision is high; the method has wide applicability and can be used for the construction of cylindrical open caisson with various diameters.
In addition, the invention also solves the problem that the later stage needs manual breaking process caused by steel frame and brick masonry structure adopted by the traditional hole door in the construction of the pipe-jacking well hole door, well solves the phenomenon of water burst, sand burst and mud burst possibly caused by the traditional hole door breaking, ensures the construction safety and the engineering quality, and is simple: the invention has simple structure and convenient installation and operation; the invention can solve the potential safety hazard and quality risk brought by the traditional tunnel portal breaking process; the invention can save time and labor consumption caused by manual brick wall building and surface plastering, and can change mortar pouring into mortar pouring, thereby having high construction speed; the process of manually breaking the tunnel door brick wall and the steel frame can be omitted by adopting the method, and the process is directly broken by a direct pipe jacking machine; the invention has wide applicability and can be used for the construction and the breaking of the portal with various diameters.
Drawings
Fig. 1 is a schematic diagram of the structure of a well-sinking ring of the present invention.
Fig. 2 is a schematic diagram of the assembly of the well ring of the present invention.
Fig. 3 is a schematic assembly view of the assembly module of the present invention.
Fig. 4 is a schematic structural view of the assembling module of the present invention.
Fig. 5 is a top view of the mounting module of the present invention.
FIG. 6 is a schematic view of the structure of the substrate ring of the present invention.
Fig. 7 is a schematic diagram of the mating of the well ring and the base ring of the present invention.
Fig. 8 is a schematic structural view of the steel corner ring of the present invention.
Fig. 9 is a schematic structural view of the prefabricated sectional type open caisson of the present invention.
FIG. 10 is a schematic view of the structure of the portal of the present invention.
Fig. 11 is a schematic structural view of the lifting device of the present invention.
Fig. 12 is a front view of the lifting device of the present invention.
In the figure: 1. the assembly module 2, the water stop strip 3, the vertical screw rod 4, the horizontal grouting hole 5, the vertical grouting hole 6, the first installation groove 7, the first arc-shaped hole 8, the arc-shaped pull rod 9, the inner groove 10, the base module 11, the sealing ring groove 12, the caulking groove 13, the grouting hole channel 14, the sinking well ring 15, the base ring 16, the steel blade angle ring 17, the steel blade angle member 18, the cross beam 19, the guide sheave 20, the adjustable counter force seat 21, the jack 22, the upright post 23, the counterweight 24, the steel wire rope 25, the fence 26, the winch 27, the winch support 28, the guide sheave 29 and the base.
Detailed Description
The structure and principles of such apparatus and method will be apparent to those skilled in the art from the following further description of the invention, taken in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The modular pipe jacking well construction equipment provided by the embodiment mainly comprises a pressure sinking device, a lifting device, a prefabricated sectional type sinking well and the like, and the main parts are exemplified and explained with reference to the attached drawings.
For the prefabricated sectional type open caisson, as shown in fig. 1 and 2, the prefabricated sectional type open caisson comprises an open caisson ring, wherein the open caisson ring is composed of a plurality of groups of assembly units which are connected end to end, each assembly unit comprises two assembly modules, the vertical sections of the assembly modules are in a right trapezoid shape, one end of each assembly module is a straight waist end, the other end of each assembly module is an oblique waist end, the two assembly modules of the same assembly unit are mutually attached through the oblique waist ends, namely the two assembly modules of the same assembly unit are reversely placed, and the two assembly modules can be assembled through the oblique waist ends of the right trapezoid because the structural section of the two assembly modules is in the form of the right trapezoid. And two adjacent assembly units are laminated each other through the straight waist end of assembly module, it is shown in combination figure 3, the outside at assembly module's both ends be equipped with first mounting groove respectively, first mounting groove in be equipped with first arc hole, the first arc hole of adjacent assembly module links up each other in order to form first connecting hole for cooperate with the arc connecting piece in order to realize the concatenation of adjacent assembly module, for example, adjacent horizontal direction's assembly module all adopts arc bolted connection, the nut is installed at the open caisson outer wall, the arc bolt passes the plastic casing, compare the open caisson internally mounted nut that current prefabricated open caisson standard block adopted, it is more safe convenient to construct.
In the assembly process of the open caisson rings, because the structures of all the assembly modules are the same, the whole open caisson ring can quickly complete the assembly and assembly tasks only by adopting one standard assembly module, the assembly modules can complete the whole prefabrication process only by using one set of template, the investment of the templates in a prefabrication plant is reduced, the structural forms of all the assembly modules are completely the same, and the whole open caisson ring is assembled by even number of assembly modules and is suitable for cylindrical open caisson with any size. And because the assembly module adopts a trapezoidal structure mode, compared with the existing concave-convex assembly block, the structure is simpler, and the manufacture is more convenient.
A plurality of layers the open caisson ring vertical splice in proper order, and adjacent two-layer the open caisson ring between be equipped with vertical connecting hole correspondingly for connect vertical screw rod in order to realize about the concatenation of two-layer open caisson ring, can satisfy the quick location installation of upper and lower layer open caisson ring, wherein vertical connecting hole preferably sets up to the counter bore, and combine figure 4 and figure 5, standard module has vertical slip casting hole along vertical direction to be equipped with horizontal slip casting hole along the horizontal direction, vertical slip casting hole is used for slip casting drag reduction to assist the pit shaft to sink, and horizontal slip casting hole can be used to after prefabricated open caisson sinks, pours into plugging material, the space that forms between the pit shaft outer wall that plugging drag reduction material lost and the stratum.
Preferably, the upper surface, the lower surface and the side edges of the assembly module are respectively provided with a sealing ring groove and a caulking groove at the splicing part of any assembly module and other assembly modules, a water stop strip is arranged at the sealing ring groove, waterproof and anticorrosive paint is arranged at the caulking groove, and the caulking groove is positioned at the inner side of the sealing ring groove. Two grooves cooperate and use, adopt waterproof anticorrosive coating with the outside seal groove of soil contact, be close to open caisson internal diameter direction sealing washer inslot and paste water swelling sealing strip, satisfy waterproof anticorrosive demand, when single waterproof inefficacy or effect is not good, the caulking groove also can adopt the slip casting measure, and ordinary open caisson adopts single waterproof construction or does not have waterproof construction, and its stagnant water effect is better compared. In addition, assembly module upper and lower face and side can also set up waterproof groove, the waterproof system installation of being convenient for, and water-proof effects will be better.
In addition, the prefabricated sectional type open caisson further comprises a base ring arranged at the bottom of the open caisson ring at the lowest layer, and with reference to fig. 6, the base ring is composed of a plurality of base modules which are connected end to end, similarly, every two base modules form a base unit, the vertical section of each base module is in a right trapezoid shape, one end of each base module is a straight waist end, the other end of each base module is an oblique waist end, two base modules of the same base unit are mutually attached through the oblique waist ends, two adjacent base units are mutually attached through the straight waist ends of the base modules, the outer sides of the two ends of each base module are respectively provided with a second mounting groove, a second arc hole is arranged in each second mounting groove, the second arc holes of the adjacent base modules are mutually connected to form a second connecting hole, and the base modules are matched with an arc connecting piece to realize the splicing of the adjacent base modules, in addition, an inner groove is arranged on the inner side of the substrate module. The bottom plate reinforcing steel bar is directly shelved on the inner groove, bottom plate concrete is poured to form a bottom plate structure, the bottom plate concrete wholeness is good, and when traditional bottom plate construction can be avoided, the steel bar joint needs to be reserved on the foundation ring, and the bottom plate reinforcing steel bar is connected with the steel bar joint who reserves, and this kind of traditional construction method can lead to consuming a large amount of manpowers man-hour, also can lead to the bottom plate steel bar joint percentage to improve simultaneously, is unfavorable for bottom plate concrete performance.
In addition, in order to ensure the waterproof effect, preferably, a sealing ring groove and a caulking groove are respectively and correspondingly arranged between the substrate ring and the open caisson ring and between the adjacent substrate modules, a water stop strip is arranged at the sealing ring groove, waterproof and anticorrosive paint is arranged at the caulking groove, and the caulking groove is positioned on the inner side of the sealing ring groove.
In a preferred embodiment, combine and show in fig. 7, the external diameter of basement ring be greater than the external diameter of open caisson ring, the basement ring on be equipped with the slip casting pore, the one end in slip casting pore with the vertical slip casting hole of open caisson ring link up, the other end in slip casting pore be located the upper end in the outside of open caisson ring, just the other end in slip casting pore not by open caisson ring cover to form a J-shaped slip casting pore, can pour into antifriction material in prefabricated open caisson sinking process, effectively reduce the frictional force of open caisson outer wall and stratum, do benefit to the open caisson and sink. And all grouting hole positions and seam positions are provided with sealing ring grooves and seam embedding grooves, and the rubber sealing strips are pasted for sealing and corrosion prevention.
In addition, as shown in fig. 8, the prefabricated sectional type open caisson further comprises a steel blade angle ring arranged at the bottom of the base ring, the steel blade angle ring is composed of a plurality of steel blade angle members which are connected end to end, all the steel blade angle members are consistent in structural form, and the connection is realized by using long stud bolts. The effect of steel sword angle ring mainly is when the open caisson sinks, reduces the resistance that the wall of a well lower extreme cut soil, does benefit to the open caisson and sinks, compares traditional concrete edge angle, and steel sword angle intensity is big, rigidity is high, and the soil cutting effect is better, and it is fast to adopt the assembled construction progress simultaneously.
Referring to fig. 9, the base ring and the steel blade angle ring are respectively provided with a corresponding connecting hole corresponding to the vertical connecting hole of the sinking well ring, so that the sinking well ring, the base ring and the steel blade angle ring are sequentially connected together through a double-head screw in the vertical direction, the outer diameter of the base ring is larger than that of the sinking well ring and that of the steel blade angle ring, and the outer diameter of the base ring is about 50 cm. And preferably, the joints between the assembly modules, the joints between the base modules and the joints of the steel blade angle members are staggered, so that the concentration of stress is reduced, and the integrity of the well bore is better.
During assembly, firstly, a plurality of steel blade angle components are spliced end to end by adopting long stud bolts to form the steel blade angle ring; then, the upper side of the steel blade angle ring is connected with a base module through a double-headed screw, and a plurality of base modules are spliced end to end by adopting a long double-headed bolt to form the base ring; and then the upper side of the base ring is connected with at least one layer of assembly modules through a double-headed screw, and the assembly modules of each layer are spliced end to end by adopting a long double-headed bolt to form at least one layer of the sinking well ring.
According to the embodiment, the traditional prefabricated open caisson standard ring is assembled by two or more standard modules, and the open caisson ring and the base ring of the embodiment only adopt a trapezoidal structure mode; the reserved steel bar joint is adopted in the position of a traditional prefabricated open caisson base ring, steel bars are connected when the bottom plate is constructed, the steel bar joint rate of the open caisson bottom plate is increased, the performance of the open caisson bottom plate is greatly influenced, the structure of the embodiment does not need to reserve the steel bar joint, the through long steel bars are placed in the installation grooves, the steel bar joint percentage is greatly reduced, and the anti-cracking and anti-permeability performance of the bottom plate is good.
In a preferred embodiment, as shown in fig. 10, an opening is formed in one side of the prefabricated sectional open caisson to serve as a hole door, a steel sleeve is arranged at the opening, a plurality of bolt holes are uniformly formed in the inner wall of the steel sleeve along the circumferential direction to connect connecting ribs made of fiber reinforced composite materials, and the connecting ribs are used for sealing the hole door through cement pouring.
For example, the steel sleeve is arranged at the opening position of the opening door of the open caisson, penetrates through the thickness of the whole push pipe well and is formed by rolling steel plates, and the steel plates are welded to form a complete barrel-shaped structure. The bolt holes are used for connecting ribs of the fiber reinforced composite material, and holes are opened before concrete of the pipe jacking well is poured. When concrete is poured, the inner side and the outer side of the bolt hole are plugged by waterproof adhesive tapes. The connecting ribs are supported by fiber reinforced composite materials, such as glass fiber ribs, carbon fiber ribs and the like, are high-strength and high-brittleness materials, and can meet the requirements of bearing the side pressure of a soil body and cutting of a pipe jacking machine. And after the fiber reinforced composite material at the tunnel portal position is installed, pouring waterproof mortar to form a complete tunnel portal structure, wherein the waterproof mortar has enough strength and can bear the lateral pressure of a soil body and simultaneously has a good waterproof effect.
Through the arrangement, the steel sleeve is provided with the bolt holes, the connecting ribs are connected through the bolt holes in the steel sleeve to form a complete material framework, and waterproof mortar is poured to form a complete tunnel portal structure. The fiber reinforced composite material has high enough strength, can well bear the side pressure brought by soil, can well solve the problem of difficult cutting of the pipe jacking well by the specific high brittleness index, can solve the problems of difficult cutting of waterproof and pipe jacking machines and the like by the waterproof mortar, can save the procedure of manually breaking the portal, and can directly break the portal by using the pipe jacking well.
The traditional tunnel portal is formed by combining a steel frame and brick masonry, and then plastering is carried out on the outer surface of the tunnel portal. This kind of tradition portal needs artifical when building brick brickwork and later stage opening a hole, also needs artifical steelframe and the brick brickwork of abolishing, both takes the manual work and also influences the time limit for a project progress, and the portal abolishes simultaneously and brings unpredictable gushes water and gushes safety risks such as mud.
When the hole door structure provided by the embodiment is adopted for construction, the fiber reinforced material is adopted to replace the steel frame, the waterproof mortar replaces the brick masonry, the hole door structure can be directly excavated by the pipe jacking machine, the processes of manual masonry and later-stage steel frame and brick wall breaking can be omitted, the hole water burst and mud burst phenomenon caused by brick wall and grid steel frame removal is avoided, the safety quality is guaranteed, and the construction progress is fast.
Simultaneously, this embodiment provides a elevating gear for festival segmentation pressure equipment of sinking, through elevating gear's setting, can be according to the height of sinking of open caisson, when the construction of sinking under the pressurization, reduce the mounting height of flip-chip jack in step, guarantee to satisfy under the prerequisite of the height of sinking of open caisson, reduce the single stroke of jack to reach and reduce the purpose of the equipment overall height that sinks, it includes: the adjustable counter-force seat is used for connecting the pressure-sinking equipment and is provided with a connecting part; the positioning support piece is provided with a plurality of matching parts which are sequentially arranged from top to bottom and used for matching with the connecting part to position and support the adjustable counter-force seat; the transmission rope is connected with the adjustable counter-force seat and comprises a reverse section, and the motion direction of the transmission rope and the motion direction of the adjustable counter-force seat are adjusted to be reverse by the transmission part at the reverse section; and the counterweight part is connected with the reverse section of the transmission rope so as to balance the gravity of the adjustable counter-force seat. Hereinafter, each member will be specifically exemplified.
Referring to fig. 11 and 12, in an embodiment, the positioning support includes a base, the rest of the components are disposed on the base, an upright is disposed on one side of the base, and a plurality of through holes are sequentially disposed on the upright from top to bottom for matching with the adjustable reaction seat.
The inner side of the adjustable counter force seat is provided with a clamping groove, the clamping groove is profiled with the outer edge of the upright column and can be matched with the outer side of the upright column, pin shafts are movably matched and connected with the two sides of the clamping groove, and the adjustable counter force seat can be connected with the upright column through the matching of the pin shafts and the through holes on the upright column. The outer side of the adjustable reaction force seat extends to the outside of the upright column, an accommodating space is formed at the outer side of the adjustable reaction force seat and is used for connecting the pressure-sinking equipment, such as a jack, and an opening is formed in the bottom of the outer side of the adjustable reaction force seat so that the working end of the pressure-sinking equipment can extend out to carry out pressure-sinking operation on the sectional type open caisson.
The transmission component comprises a cross beam arranged at the top of the upright post, at least one pair of guide head sheaves arranged in parallel is arranged on the cross beam and used for adjusting the motion direction of the transmission rope to the opposite direction of the motion direction of the adjustable reaction seat, for example, the front end and the tail end of the cross beam are respectively provided with the guide head sheaves. The transmission rope is connected with the adjustable counter-force seat and then matched with the guide head sheave, so that the change of the motion direction is realized, after the guide of the guide head sheave, the transmission rope is provided with a section of reverse section, and the motion direction of the reverse section driving the adjustable counter-force seat is opposite to the motion direction of the reverse section. For example, as shown in FIG. 12, when the adjustable counter force seat moves downward, the reversing segment moves upward; and when the adjustable counter-force seat moves upwards, the reverse section moves downwards.
Furthermore, a counterweight is arranged at the reverse section to balance the gravity of the adjustable counter-force seat. In this embodiment, the base on corresponding to the setting position of counterweight be equipped with the rail, counterweight includes hanging flower basket and balancing weight, the hanging flower basket connect the driving rope on, the balancing weight can adopt stack formula iron plate preparation, install on the hanging flower basket with the counter weight piecemeal that the loading force opposite direction, and can actually increase and reduce counter weight gage block quantity according to the weight that promotes the thing. Preferably, the rail adopts U type opening rail, opening side subtend stand, and U type opening rail adopts steel pipe and band steel preparation, and the counterweight is enclosed and is kept off, when preventing to promote the operation, produces the heavy object and falls, causes the injury of people's body, opening side subtend stand, both easy to assemble, the increase and decrease operation of the counter weight of also being convenient for.
In addition, the transmission rope is provided with a forward section at the rear side of the reverse section. In this embodiment, the base is further provided with at least one pair of guide ground wheels arranged in parallel for changing the moving direction and adjusting the moving direction of the driving rope to be consistent with the moving direction of the adjustable reaction force seat. After the guide of the guide head sheave, the transmission rope is provided with a section of forward section, and the direction of the forward section driving the adjustable counter-force seat to move is the same as the moving direction of the forward section.
Preferably, the positive section is connected to a winch, and a winch support is arranged on the base corresponding to the position of the winch to support the winch, so that a constructor can operate the winch to drive the transmission rope to move, and the position of the adjustable counter force seat can be changed. In one embodiment, the winch support is made of angle steel, the iron sealing plate on the surface of the framework is used as an installation foundation of the winch, and the winch support is light and handy, highly conforms to the principle of man-machine safety and is suitable for workers to operate. And the winch can have a self-locking function, and a steel wire rope is used as a transmission rope for transmission.
Through the arrangement, the guide head sheave is arranged on the cross beam in pairs, so that the force transmission direction can be changed through the guide head sheave, the vertical downward force of the jack and the base of the jack is changed into the vertical upward force, the force balance can be realized through the counterweight, and the manual operation force during lifting is greatly reduced. And the adjustable reaction seat is adjusted up and down on the upright post through the pin shaft, and the adjustable reaction seat can be adjusted down along with the sinking of the loaded object in the pressurizing and sinking process by adjusting the elevation of the adjustable reaction seat, so that the structural size of the jack can be effectively reduced.
During the use, when the sinking equipment sinks to the open caisson downwards to the target position, remove the cooperation of connecting portion and cooperation portion to apply decurrent motion stroke through the forward section, so that the driving rope drives adjustable counter-force seat and moves down to the position of next cooperation portion, and then realize the location and the support to adjustable counter-force seat through the cooperation of connecting portion and cooperation portion again, and carry out subsequent sinking, reciprocal operation from this realizes sinking of whole open caisson.
Specifically, it comprises the following steps:
1. construction preparation;
2. after the open caisson segment is manufactured to reach the design strength, pressurizing and sinking;
3. after the jack stroke is in place, the jack is withdrawn;
4. the jack base is lowered to the position of a through hole through a lifting device;
5. after the jack is installed and fixed, the winch is locked;
6. repeating the construction until the open caisson sinks to the position;
7. after the designed elevation is reached, the jack and the adjustable counter-force seat are lifted to the position of the uppermost through hole through the lifting device, and the next sinking construction is waited;
8. and locking the winch for maintenance.
Examples
The embodiment provides a using method of modular pipe jacking well construction equipment, which comprises the following specific steps:
s1, according to the design height, the diameter, the hole entering and exiting positions and other requirements of the pipe jacking well, vertical layering and annular block modeling are carried out on the pipe jacking well, and therefore the appropriate block size, the appropriate staggered joint position and the like are determined.
And S2, according to the determined layering and block size, prefabricating standard modules, base modules, steel blade angle components and the like which form the pipe jacking well in a factory mode.
And S3, independently prefabricating modules occupied by the tunnel doors, and reserving openings at the positions of the tunnel doors.
And S4, measuring and setting out, and determining the sinking position of the open caisson.
And S5, leveling the construction range of the open caisson. Firstly, guarantee open caisson steel blade angle ring and be in the horizontality, secondly provide sufficient bearing capacity for the installation of basement ring.
S6, assembling the steel blade angle ring: the adjacent steel blade angle components are connected by adopting a double-head long screw.
And S7, installing a pressure sinking device.
S8, assembling a base ring: and in the circumferential direction, the adjacent substrate modules are connected by adopting an arc-shaped pull rod.
And S9, starting the pressure sinking equipment to perform pressure sinking after the substrate ring is completed. And synchronously taking soil in the cantilever excavator well.
And S10, after the base ring sinks to the designated position, connecting the longitudinal steel bars through an embedded steel sleeve embedded at the top of the base module.
S11, standard ring installation: vertical connecting holes in the standard modules penetrate through longitudinal steel bars extending out of the base ring and are screwed down by nuts, and arc-shaped pull rods are connected in the circumferential direction.
And S12, after the standard ring is installed, starting the pressure-sinking equipment, and grouting to the outer wall of the shaft for friction reduction through the vertical grouting hole in the standard module. And simultaneously, taking soil in the well, and closing the pressure sinking equipment and the grouting system after the marking ring is sunk to the designated position.
S13, mounting an upper standard ring: the vertical connecting steel bars are fastened through nuts of the lower standard ring, and the standard modules penetrate through the vertical connecting holes and are fastened through the nuts.
And S14, starting the pressure sinking equipment and the grouting system, simultaneously taking soil in the well, and sinking the open caisson to a specified elevation. And closing the pressure-sinking equipment and the grouting system.
And S15, circulating in sequence to finish the installation and sinking work of the standard ring.
And S16, assembling requirements and methods of the height range of the tunnel door are the same as those of the standard ring, after assembling is completed, installing fiber reinforced materials, and after the reinforced materials are installed, pouring cement mortar until the tunnel door is closed.
S17, maintenance of the portal ring: the tunnel portal has certain strength and is ready to sink.
And S18, after the tunnel portal is plugged, starting the pressure sinking equipment and the grouting system, and simultaneously taking soil in the well to finish sinking.
And S16, continuously completing the assembly and sinking operation of other standard rings according to the steps S10-S13, and finally completing the assembly of the push bench and sinking to a specified elevation.
And S17, finally, grouting from the inside to the outside of the top pipe well through grouting holes in the base module and the standard module to finish the plugging work.
Claims (10)
1. A modular pipe jacking well construction device is characterized by comprising a pressure sinking device, a lifting device and a prefabricated sectional type sinking well, wherein,
the lifting device comprises:
the adjustable counter-force seat is used for connecting the pressure-sinking equipment and is provided with a connecting part;
the positioning support piece is provided with a plurality of matching parts which are sequentially arranged from top to bottom and used for matching with the connecting part to position and support the adjustable counter-force seat;
the transmission rope is connected with the adjustable counter-force seat and comprises a reverse section, and the motion direction of the transmission rope is adjusted to be the reverse direction of the motion direction of the adjustable counter-force seat by the transmission part at the reverse section;
the counterweight part is connected with the reverse section of the transmission rope so as to balance the gravity of the adjustable counter-force seat;
the prefabricated sectional type open caisson comprises a plurality of open caisson rings and a base ring positioned at the bottom of the open caisson ring at the lowermost layer, wherein an inner groove is formed in the inner side of the base ring and used for being matched with a connecting bottom plate structure.
2. The modular pipe jacking well construction equipment according to claim 1, wherein one side of the prefabricated sectional type open caisson is provided with an opening as a hole door, a plurality of bolt holes are uniformly arranged at the opening along the circumferential direction for connecting the connecting ribs made of fiber reinforced composite materials, and the connecting ribs close the hole door through cement pouring.
3. The modular pipe jacking well construction equipment according to claim 1, wherein the sinking ring is composed of a plurality of groups of assembly units which are connected end to end, each assembly unit comprises two assembly modules, the vertical sections of the assembly modules are in a right trapezoid shape, one end of each assembly module is a straight waist end, the other end of each assembly module is an inclined waist end, the two assembly modules of the same assembly unit are mutually attached through the inclined waist ends, the two adjacent assembly units are mutually attached through the straight waist ends of the assembly modules, the outer sides of the two ends of each assembly module are respectively provided with a first installation groove, each first installation groove is internally provided with a first arc-shaped hole, and the first arc-shaped holes of the adjacent assembly modules are mutually connected to form a first connection hole for being matched with an arc-shaped connecting piece to realize the splicing of the adjacent assembly modules;
the vertical splicing of a plurality of layers of open caisson rings, wherein vertical connecting holes are correspondingly arranged between two adjacent layers of open caisson rings and are used for connecting vertical screw rods so as to realize the splicing of the upper and lower layers of open caisson rings.
4. The modular pipe jacking well construction equipment according to claim 1, wherein the base ring is composed of a plurality of base modules which are connected end to end, second mounting grooves are respectively arranged on the outer sides of two ends of each base module, second arc-shaped holes are arranged in the second mounting grooves, and the second arc-shaped holes of adjacent base modules are connected with each other to form second connecting holes which are used for being matched with the arc-shaped connecting pieces to realize the splicing of the adjacent base modules;
the outer diameter of the base ring is larger than that of the sinking well ring, a grouting hole is formed in the base ring, one end of the grouting hole is connected with a vertical grouting hole of the sinking well ring, the other end of the grouting hole is located at the upper end of the outer side of the sinking well ring, and the other end of the grouting hole is not covered by the sinking well ring.
5. The modular pipe jacking well construction equipment according to claim 1, wherein the adjustable reaction seat is movably and cooperatively connected with a pin shaft, the positioning support member comprises a vertical column, and the vertical column is sequentially provided with a plurality of through holes from top to bottom for being matched with the pin shaft.
6. The modular push bench construction equipment as claimed in claim 1, wherein said reverse section of said driving rope has a forward section at its rear side, and said forward section adjusts the direction of movement of said driving rope back to forward direction by said driving member.
7. The lifting device for a sectional type press-sinking apparatus as claimed in claim 1 or 6, wherein the transmission member comprises a guide head sheave disposed at an upper side of the positioning support member for adjusting a moving direction of the transmission rope to a direction opposite to a moving direction of the adjustable reaction force base.
8. The lifting device for a sectional type press-sinking apparatus as claimed in claim 6, wherein the driving means comprises a ground guiding wheel provided on a lower side of the upper guiding wheel for adjusting the moving direction of the forward section of the driving rope back to the forward direction.
9. The lifting device for a segmented press-sinking apparatus as claimed in claim 6, wherein the driving means comprises a guide land wheel for adjusting the direction of movement of the forward segment of the driving rope back to the forward direction.
10. A method of using the lifting device for a sectional type heave apparatus according to claim 1, characterized in that the method comprises: assembling a layer of the prefabricated sectional type open caisson, performing pressure sinking on the layer-changed prefabricated sectional type open caisson through pressure sinking equipment, after sinking to a specified position, assembling the layer of the prefabricated sectional type open caisson, connecting two layers of the prefabricated sectional type open caisson which are adjacent up and down through longitudinal steel bars, and performing pressure sinking on the layer of the prefabricated sectional type open caisson through the pressure sinking equipment to complete the pressure sinking of the whole prefabricated sectional type open caisson;
in the process of pressing and sinking, after the pressing and sinking equipment presses and sinks in place, the matching of the connecting part and the matching part is removed, a downward movement stroke is applied through the forward section, so that the transmission rope drives the adjustable counter-force seat to move downwards to the position of the next matching part, and then the positioning and the supporting of the adjustable counter-force seat are realized through the matching of the connecting part and the matching part, and the subsequent pressing and sinking are carried out.
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| CN202010960481.6A CN112502178A (en) | 2020-09-14 | 2020-09-14 | Modular pipe jacking well construction equipment and use method |
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| CN202010960481.6A CN112502178A (en) | 2020-09-14 | 2020-09-14 | Modular pipe jacking well construction equipment and use method |
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| CN110747876A (en) * | 2019-09-11 | 2020-02-04 | 中铁上海工程局集团有限公司 | Auxiliary device for sinking in open caisson construction and operation method thereof |
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| CN108316328A (en) * | 2018-03-02 | 2018-07-24 | 中铁上海工程局集团有限公司 | A kind of pressurization sinking device and its construction method for open caisson construction |
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