CN102536267A - Method for performing large-gradient deviated well construction by using full-section needle beam trolley and needle beam trolley - Google Patents
Method for performing large-gradient deviated well construction by using full-section needle beam trolley and needle beam trolley Download PDFInfo
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- CN102536267A CN102536267A CN2012100581208A CN201210058120A CN102536267A CN 102536267 A CN102536267 A CN 102536267A CN 2012100581208 A CN2012100581208 A CN 2012100581208A CN 201210058120 A CN201210058120 A CN 201210058120A CN 102536267 A CN102536267 A CN 102536267A
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Abstract
The invention discloses a method for performing large-gradient deviated well construction by using a full-section needle beam trolley. The full-section needle beam trolley comprises a needle beam and a die body, wherein the needle beam is arranged in a die body frame of the die body and can move axially; and an included angle between a large-gradient deviated well and a horizontal plane is more than 10 degrees. The method comprises the following steps of: guiding eight sections of guiding steel wire ropes in the needle beam, dragging six sections of traction steel wire ropes in the needle beam trolley, performing the reinforcement, supporting, limit and anti-skid firming of the needle beam trolley and concreting once. The invention also discloses the needle beam trolley, which comprises a needle beam guiding device, wherein the needle beam guiding device consists of two dual-wheel pulleys, three single-wheel pulleys and eight sections of guiding steel wire ropes. The method for performing the large-gradient deviated well construction by using the full-section needle beam trolley has the advantages of simple construction process, small construction difficulty, high construction quality, quick construction progress and short construction period, potential safety hazards can be reduced or avoided, and labor cost and time cost can be saved.
Description
Technical field
The present invention relates to a kind of method and construction equipment of slope construction, relate in particular to method and needle beam chassis that the full section needle beam of a kind of usefulness chassis carries out the heavy grade slope construction.
Background technology
Inclined shaft in the tunnel inclined shaft engineering is for there being the pressure circular tunnel; Conventional construction method generally adopts " combined steel formwork+all round victory frame " and " steel form carrier " to carry out concrete pouring construction; Promptly adopt manual work to set up all round victory frame, install and reinforce the constructure scheme that combined steel formwork carries out concreting and branch base plate, limit crown two-step pouring, its advantage is: take this dual mode to carry out the concrete pouring construction technology maturation; Constructor's easy master, skilled operation; Its shortcoming is: construction technology is complicated, potential safety hazard is big, workmanship is wayward, and input cost is higher, and construction speed is slow, influences the construction period.
The shortcoming of above-mentioned conventional construction method is particularly evident in the heavy grade slope construction; Being 20 ° such as the inclined shaft gradient is that angle between heavy grade inclined shaft and the horizontal plane is that diameter is under the situation of 7.5m, total length 160m behind 20 °, digging diameter 9m, lining cutting, according to traditional concrete pouring construction scheme, for example: a combined steel formwork+full hall frame, steel form carrier; Be difficult to organize and implement; And the safety of can't ensuring the quality of products, and influence the construction period, be difficult to guarantee the realization of engineering inclined shaft engineering overall goal.At present also full section needle beam chassis is not used for bibliographical information and the application project that the inclined shaft gradient is 20 ° a slope construction.
Summary of the invention
The object of the invention provides the full section needle beam of a kind of usefulness chassis to carry out the method and the needle beam chassis of heavy grade slope construction with regard to being in order to address the above problem.
In order to achieve the above object, the present invention has adopted following technical scheme:
The full section needle beam of usefulness according to the invention chassis carries out in the method for heavy grade slope construction; Said full section needle beam chassis comprises needle beam and die body; Said needle beam places in the die body framework of said die body and can do with respect to the moving axially of said die body, and the angle between said heavy grade inclined shaft and the horizontal plane is greater than 10 °; Said method comprises needle beam guidance method, needle beam chassis traction method, needle beam chassis fixing method and concreting method; In the said needle beam guidance method, the assembly pulley of said needle beam adopts 8 sections guiding wire rope to accomplish the guiding of said needle beam; Said needle beam chassis traction method is: the both sides at said die body framework are provided with movable pulley; Outlet section both sides at said heavy grade inclined shaft are provided with hoist engine; On said hoist engine, running block is installed, is adopted 6 sections haulage cables between movable pulley on the said die body framework of homonymy and the running block on the said hoist engine; Said needle beam chassis fixing method comprises: (1) vertically is provided with junction plate in the both sides of the die body framework of said full section needle beam chassis; Said die body framework is connected to integral body; (2) in the rear end of said needle beam and the front end of said full section needle beam chassis supporter is set; (3) at the pulley groove place of the movable pulley of the assembly pulley of said needle beam and said die body framework limiting plate is set, dynamometer is installed in the assembly pulley position on said hoist engine respectively simultaneously, at said die body back-end framework limiting plate is set; (4) the outlet section medium position at said heavy grade inclined shaft is provided with steel truss, between the front end of said needle beam and said steel truss, the antiskid wire rope is set; Said concreting method is: the concrete in the concrete delivery truck is pumped in the said full section needle beam chassis one-time-concreting moulding in a segmentation through delivery pump.
The assembly pulley of needle beam adopts 8 sections guiding wire rope to accomplish the guiding of needle beam; Carrying out obtaining required tractive force after the conversion Calculation in conjunction with the gradient of 20 ° on weight and the inclined shaft of needle beam, guiding wire rope is 26.74 ÷ 8=3.34t; The former configuration hoist engine of full section needle beam chassis just can meet the demands, and accomplishes the displacement of needle beam smoothly.Between the hoist engine of die body framework and inclined shaft outlet section, adopt 12 sections haulage cable (6 sections of sides; 12 sections altogether of both sides) be used to draw full section needle beam chassis; Carrying out obtaining required tractive force after the conversion Calculation in conjunction with the gradient of 20 ° on the weight of full section needle beam chassis and inclined shaft is 66.82 ÷ 12=5.57t; The gross weight that amounts to 12 sections in conjunction with haulage cable is 3.936t; Drawing full section needle beam chassis, to need tractive force altogether be 3.936+5.57=9.51t＜10t, so can meet the demands at 2 5t hoist engines of inclined shaft outlet section configuration.Above-mentioned fixing method guarantees that on the one hand full section needle beam chassis can be not impaired in running, can guarantee that on the other hand the problem that slides to the shaft bottom voluntarily can not appear in full section needle beam chassis, guarantees to construct and carries out smoothly.Combine delivering concrete through concrete delivery truck and delivery pump, effectively solve long problem apart from lower curved section engineering concrete hard transportation.
Particularly, in the said needle beam guidance method, the assembly pulley of said needle beam adopts two two-wheel pulleys and three gin blocks to unite the formation operational system; In the said needle beam chassis traction method, a three-wheel movable pulley respectively is set, two two-wheel movable pulley is installed on a said hoist engine is formed running block in the both sides of said die body framework; In the said needle beam chassis fixing method, between the front end of said needle beam and said steel truss, two parallel antiskid wire rope are set.
Particularly, the angle between said heavy grade inclined shaft and the horizontal plane is 20 °.
Needle beam chassis according to the invention comprises the needle beam guiding device; Said needle beam guiding device comprises two two-wheel pulleys, three gin blocks and the wire rope that leads; Said two two-wheel pulleys are installed on the said needle beam truss side by side; Said three gin blocks are installed on the said needle beam truss relative with said two two-wheel pulleys side by side; Said guiding wire rope from fixed end begin to walk around successively behind first two-wheel pulley, first gin block, first two-wheel pulley, second gin block, second two-wheel pulley, the 3rd gin block, second two-wheel pulley and the hauling block with said full section needle beam chassis on the hoist engine that carries be connected, said guiding wire rope forms 8 sections altogether.
Further; Said needle beam chassis also comprises needle beam chassis draw-gear; Said needle beam chassis draw-gear comprises two three-wheel movable pulley, four two-wheel movable pulley, hoist engine and haulage cables, and two said three-wheel movable pulley are arranged at the both sides of said die body framework respectively, and said hoist engine is two; Be installed on the outlet section both sides of said heavy grade inclined shaft respectively; Two are one group and are installed on the said hoist engine in the said two-wheel movable pulley, connect through said haulage cable between three-wheel movable pulley on the said die body framework of homonymy and the two-wheel running block on the said hoist engine, and said haulage cable forms 6 sections altogether.
Further; Said needle beam chassis also comprises needle beam chassis securing device, and said needle beam chassis securing device comprises the truss reinforcement device, and said truss reinforcement device comprises 8 i iron; 4 is one group in said 8 i iron, is arranged at the upper and lower two-layer of said die body framework both sides respectively.
Further; Said needle beam chassis securing device also comprises bracing or strutting arrangement; Said bracing or strutting arrangement comprises that earth anchor, preceding supporter, preceding support are very heavy, pre-embedded steel slab, back supporter and back are supported very heavy; The two ends of supporter are connected with said earth anchor with said needle beam chassis front center respectively before said, and the middle part of said preceding supporter is connected through supporting very heavy and said needle beam chassis front end bottom before said, and said earth anchor is arranged in the basement rock; The two ends of said back supporter are connected with said pre-embedded steel slab with said needle beam upper rear end respectively, and the middle part of said back supporter is supported middle part, very heavy and said needle beam rear end through said back and is connected, and said pre-embedded steel slab is arranged in the concreting.
Further; Said needle beam chassis securing device also comprises stopping means; Said stopping means comprises spacing i iron and dynamometer; Said spacing i iron comprises polylith, is installed on pulley groove place and the rear end of said die body framework of the movable pulley of the pulley groove place of the assembly pulley of said needle beam, said die body framework respectively, and said dynamometer is installed on the running block position on the said hoist engine.Through measuring the stressing conditions of the running block on the hoist engine, analyze the safe condition of trailer system in the running.
Further; Said needle beam chassis securing device also comprises friction skidding device; Said friction skidding device comprises anti-skidding wire rope and steel truss, and said steel truss is arranged at the outlet section middle part of said heavy grade inclined shaft, and said antiskid wire rope is installed between the front end and said steel truss of said needle beam.
As preferably, said antiskid wire rope is two of being parallel to each other and coaxial with said needle beam chassis.
Beneficial effect of the present invention is:
Adopt needle beam chassis according to the invention and carry out the heavy grade slope construction by the method for the invention; Have that construction technology is simple, difficulty of construction is little, construction quality is high, construction speed is fast, the advantage of short construction period; Simultaneously potential safety hazard be can reduce or avoid, manpower and time cost saved.
Description of drawings
Fig. 1 is the construction sketch map that the full section needle beam of usefulness according to the invention chassis carries out the heavy grade slope construction;
Fig. 2 is the structural representation of the stopping means in the needle beam chassis according to the invention;
Fig. 3 is the structural representation of the bracing or strutting arrangement in the needle beam chassis according to the invention;
Fig. 4 is the main TV structure sketch map of the needle beam guiding device in the needle beam chassis according to the invention;
Fig. 5 is the fragmentary top TV structure sketch map of the needle beam guiding device in the needle beam chassis according to the invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is made further specific descriptions:
As shown in Figure 1; The full section needle beam of usefulness according to the invention chassis carries out in the method for heavy grade slope construction; Said full section needle beam chassis 2 comprises needle beam 17 and die body 31; Needle beam 17 places in the die body framework 26 of die body 31 and can do with respect to the moving axially of die body 31, and the angle between heavy grade inclined shaft 1 and the horizontal plane is 20 °; Said method comprises needle beam guidance method, needle beam chassis traction method, needle beam chassis fixing method and concreting method.
Like Fig. 4 and shown in Figure 5, in the said needle beam guidance method, the assembly pulley of needle beam 17 adopts two two-wheel pulleys 25 and three gin blocks 24 to unite the formation operational system, forms 8 sections guiding wire rope 19 altogether, accomplishes the guiding of needle beam 17.
In conjunction with Fig. 1; The traction method of needle beam chassis 2 is: in the both sides of die body framework 26 a three-wheel movable pulley is set respectively; Outlet section both sides at heavy grade inclined shaft 1 are provided with hoist engine; Two two-wheel movable pulley are installed on a said hoist engine are formed running block, adopt 6 sections haulage cable (not shown)s between movable pulley on the die body framework 26 of homonymy and the running block on the hoist engine, both sides form 12 sections haulage cables altogether; Draw-gear and the guiding device structure in the needle beam guidance method that above-mentioned three-wheel movable pulley, hoist engine, running block and haulage cable are formed are similar, so do not illustrate in the drawings.
Like Fig. 1, Fig. 2 and shown in Figure 3; The fixing method of needle beam chassis 2 comprises: (1) vertically is provided with junction plate in the both sides of the die body framework 26 of full section needle beam chassis 2; Die body framework 26 is connected to integral body; (2) in the rear end of needle beam 17 and the front end of full section needle beam chassis 2 supporter is set; (3) at the pulley groove place of the movable pulley of the assembly pulley of needle beam 17 and die body framework 26 limiting plate is set, the dynamometer (not shown) is installed in the assembly pulley position on hoist engine respectively simultaneously, in the rear end of die body framework 26 limiting plate is set; (4) the outlet section medium position at heavy grade inclined shaft 1 is provided with the steel truss (not shown), between the front end of needle beam 17 and steel truss, two parallel antiskid wire rope (not shown)s is set; Said concreting method is: the concrete in the concrete delivery truck 6 is pumped in the full section needle beam chassis 2 one-time-concreting moulding in a segmentation through delivery pump 4.Shown in Fig. 1: track 8, winch haulage cable 7, concrete transporting chute 5, concrete delivery pump pipe 3 and rail meter 30 in the heavy grade inclined shaft 1.
Like Fig. 4 and shown in Figure 5; Full section needle beam chassis 2 according to the invention comprises the needle beam guiding device; Said needle beam guiding device comprises two two-wheel pulleys 25, three gin blocks 24 and guiding wire rope 19; Two two-wheel pulleys 25 are installed on the truss of needle beam 17 side by side; Three gin blocks 24 are installed on the truss of the needle beam 17 relative with two two-wheel pulleys 25 side by side; Guiding wire rope 19 is walked around first two-wheel pulley, first gin block, first two-wheel pulley, second gin block, second two-wheel pulley, the 3rd gin block, second two-wheel pulley and hauling block 16 backs successively from fixed end 18 beginning and is connected with the hoist engine 23 that carries on the section needle beam chassis entirely; Guiding wire rope 19 forms 8 sections altogether, also has conventional being used for to the spacing position-limited wheel 20 of the wire rope 19 of leading of being provided with between hauling block 16 and above-mentioned second the two-wheel pulley.Fig. 4 illustrates the walking mechanism 21 of needle beam 17, the strainer 22 of guiding wire rope 19.
In conjunction with Fig. 1; Needle beam chassis 2 also comprises needle beam chassis draw-gear, and said needle beam chassis draw-gear comprises two three-wheel movable pulley, four two-wheel movable pulley, hoist engine and haulage cables, and two three-wheel movable pulley are arranged at the both sides of die body framework 26 respectively; Hoist engine is two; Be installed on the outlet section both sides of heavy grade inclined shaft 1 respectively, two are one group and are installed on the hoist engine in the two-wheel movable pulley, connect through haulage cable between three-wheel movable pulley on the die body framework 26 of homonymy and the two-wheel running block on the hoist engine; Haulage cable forms 6 sections altogether; Both sides form 12 sections haulage cables altogether, and draw-gear and the guiding device structure in the needle beam guidance method that above-mentioned three-wheel movable pulley, hoist engine, running block and haulage cable are formed are similar, so do not illustrate in the drawings.
Like Fig. 1, Fig. 2 and shown in Figure 3; Needle beam chassis 2 also comprises needle beam chassis securing device; Said needle beam chassis securing device comprises the truss reinforcement device; Said truss reinforcement device comprises 8 i iron (not shown)s, and 4 is one group in 8 i iron, is arranged at the upper and lower two-layer of die body framework 26 both sides respectively.Said needle beam chassis securing device also comprises bracing or strutting arrangement; Said bracing or strutting arrangement comprises that earth anchor 14, preceding supporter 13, preceding support are very heavy 15, pre-embedded steel slab 9, back supporter 10 and back support very heavy 11; The two ends of preceding supporter 13 are connected with earth anchor 14 with the front center of needle beam chassis 2 respectively; The middle part of preceding supporter 13 is connected with the front end bottom of needle beam chassis 2 through preceding support very heavy 15, and earth anchor 14 is arranged in the basement rock; The two ends of back supporter 10 are connected with pre-embedded steel slab 9 with the upper rear end of needle beam 17 respectively, and the middle part of back supporter 10 is connected with the middle part, rear end of needle beam 17 through back support very heavy 11, and pre-embedded steel slab 9 is arranged in the concreting.12 is operating platform among Fig. 3.Said needle beam chassis securing device also comprises stopping means; Said stopping means comprises cross spacing i iron 28, longitudinal spacing i iron 27, traction stiffener 29 and dynamometer (not shown); Cross spacing i iron 28 and longitudinal spacing i iron 27 are installed on pulley groove place and the rear end of die body framework 26 of movable pulley of pulley groove place, the die body framework 26 of the assembly pulley of needle beam 19 respectively, and dynamometer is installed on the running block position on the hoist engine.Through the stressing conditions of the running block on the dynamometer mensuration hoist engine, analyze the safe condition of trailer system in the running.Said needle beam chassis securing device also comprises friction skidding device; Said friction skidding device comprises anti-skidding wire rope (not shown) and steel truss (not shown); Steel truss is arranged at the outlet section middle part of heavy grade inclined shaft 1; The antiskid wire rope is installed between the front end and steel truss of needle beam 17, and the antiskid wire rope is two of being parallel to each other and coaxial with said needle beam chassis 2.
In conjunction with Fig. 1-Fig. 5; The assembly pulley of needle beam 17 adopts 8 sections guiding wire rope 19 to accomplish the guiding of needle beam 17; Carrying out obtaining required tractive force after the conversion Calculation in conjunction with 20 ° gradient of weight and the inclined shaft 1 of needle beam 17, guiding wire rope 19 is 26.74 ÷ 8=3.34t; The displacement of needle beam 17 is accomplished in carrying hoist engine 23 and just can meeting the demands of full section needle beam chassis 2 former configurations smoothly.Between the hoist engine of die body framework 26 and inclined shaft 1 outlet section, adopt 12 sections haulage cable (6 sections of sides; 12 sections altogether of both sides) be used to draw full section needle beam chassis 2; Carrying out obtaining required tractive force after the conversion Calculation in conjunction with 20 ° gradient of the weight of full section needle beam chassis 2 and inclined shaft 1 is 66.82 ÷ 12=5.57t; The gross weight that amounts to 12 sections in conjunction with haulage cable is 3.936t; Drawing full section needle beam chassis 2, to need tractive force altogether be 3.936+5.57=9.51t＜10t, so can meet the demands at 2 5t hoist engines of outlet section configuration of inclined shaft 1.Combine delivering concrete through concrete delivery truck 6 and delivery pump 4, effectively solve long problem apart from lower curved section engineering concrete hard transportation.
Below in conjunction with concrete experimental project and Fig. 1-Fig. 5 the present invention is made further specific descriptions:
This experimental project is that the concrete construction engineering of pressing circular tunnel is arranged, and total length 166.03m belongs to III, V class surrounding rock.Digging diameter is 8.9～9.5m, and lining thickness is 60～80cm, internal diameter 7.50m after the lining cutting.Take full section construction according to the design drawing construction requirement, section length 6～8m, maximum section concreting 213.63m3, the later stage is 8.9m through design alteration for the concreting section length.Mainly comprise: tiltedly the hole section is upper and lower curved section, and oblique hole section straight section and part pipe laying section are from the horizontal by 20 ° of angles.
Concrete construction sequence is following:
(1) the mobile mechanical analysis and the improvement of needle beam 17:
Correlation technique parameter through needle beam chassis 2 can be known: needle beam 17 heavy 30.0t; Therefore the mobile tractive force calculating formula in the concrete construction of needle beam 17 in inclined shaft 1 is: F1=G1+f1, in the formula: G1=W1sina=30 * sin20 °=10.26t of downslide component; Frictional force f1=μ 1P1, P1=W1cos20 °=30 * cos20 °=28.19t, the friction coefficient mu 1=0.05 between steel and the steel～0.1 gets 0.075, f1=0.075 * 28.19=2.11t.
The mobile tractive force F1=10.26+2.11=12.37t of needle beam 17 considers 2.0 safety factor, needs tractive force 12.37 * 2.0=26.74t so needle beam 17 moves up.
Therefore combine the force analysis situation, need needle beam chassis 2 former guiding mechanisms are improved, accomplish moving of needle beam 17 through the mode that the original 4 guiding wire rope pulley groups of guiding mechanism are improved to 8 guiding wire rope pulley groups.Need tractive force 26.74 ÷ 8=3.34t＜5t after the conversion, the carrying hoist engine 23 and can meet the demands of former configuration.
(2) the mobile force analysis and the improvement of die body 31:
Die body 31 mainly comprises: template assembly, beam frame assembly, walking mechanism, anti-floating system and several major parts of carriage, 66t always conducts oneself with dignity.Other imposed loads mainly comprise aisle, plank, constructor, bonding concrete etc. in the lining cutting process, amount to about 15t.Gross weight=the 66t+15t=81.0t of die body 31.The mobile required tractive force F2=G2+f2 of die body 31 is in the formula: G2=W2sina=81 * sin20 °=27.70t of downslide component; Frictional force f2=μ 2P2, P2=W2cos20 °=81 * cos20 °=76.12t.Friction coefficient mu 2=0.05 between steel and the steel～0.1 gets 0.075, f2=0.075 * 76.12=5.71t.
The moving tractive force G2=27.70+5.71=33.41t of upwards slippage of die body 31 considers 2.0 safety factor, so the mobile tractive force 33.41 * 2.0=66.82t that needs of die body 31.
In conjunction with the Force Calculation situation; Need to improve to die body 31, die body 31 moves and mainly relies on center, die body framework 26 front end both sides installation running block, changes through the assembly pulley mechanics; To die body 31 traction, make itself and the needle beam 17 generation relative motions of needle beam chassis 2 by external force.
(3) application of needle beam chassis 2 operation:
1. needle beam partly moves and uses operation:
Through the Force Calculation analysis, improve through local guiding mechanism needle beam chassis 2, need tractive force 26.74 ÷ 8=3.34t＜5t after the mechanics conversion, so needle beam 17 utilizes former configuration 5t to carry hoist engine 23 to draw.
2. the application of die body 31 operation:
Through the Force Calculation branch; Die body framework 26 increases through to die body 31 are provided with running block, need tractive force 66.82 ÷ 12=5.57t after the mechanics conversion, mainly rely on external force to draw mobile to die body 31; Therefore draft in outlet section engineering 7+067.446 position and be symmetrical set 2 5t hoist engines; Move for guaranteeing that die body 31 is parallel, hoist engine is combined operation and single control operation one, can rectify a deviation and can make die body 31 trouble-free operations.Steel truss structure is set so that fixed pulley and leading block to be installed simultaneously before 7+058.245～the 7+067.446 section is hoist engine, the running block that is provided with die body framework 26 front end both sides is connected to form holonomic system, to guarantee die body 31 safe operations.
Hoist engine configuration parameter: rated speed of rope 10m/min; Drum diameter Φ 400mm; Reel width 720mm; Roller steel wire rope capacity: 250m; Wirerope diameter Φ 21.5; Motor model: YZR160L-6; Power: 11kW; Reductor specifications and models: ZSZ703; Gearratio: 153.5; Resultant gear ratio 153.5; Brake model: YWZB-300/25.
The haulage cable configuration:
After the mechanics conversion, die body 31 needs tractive force 5.57t, must consider the pulling force that the haulage cable deadweight produces in die body 31 moving process simultaneously.
Allow that according to haulage cable pulling force should satisfy following formula and require: Sg≤α R/K calculates, in its formula:
The Sg-haulage cable is allowed pulling force (N);
α-haulage cable rupture pull force conversion coefficient (or discontinuity coefficient);
R-haulage cable rupture pull force summation;
K-haulage cable safety factor.
Assembly pulley haulage cable Sg=5.57t, α value 0.82; The K value is according to being used for electric hoisting device security coefficient settings, and the K value gets 5 in the following formula.
Through calculating: 5.57=0.82 * R ÷ 5R=33.96t=332.84KN, so through consulting the haulage cable specification table, haulage cable is chosen Φ 21.5mm (6 * 37+1) wire rope, haulage cable nominal tensile strength 1850N/mm2.Haulage cable Unit Weight 1.64kg/m, length 200m.Single hop haulage cable gross weight: 1.64 * 200/1000=0.328t, the assembly pulley haulage cable amounts to 12 sections gross weight 3.936t.Die body moves needs tractive force altogether: 3.936+5.57=9.51t＜10t, so 2 5t hoist engines of configuration meet the demands.
(4) concrete pouring construction of inclined shaft 1:
1. reinforced bar engineering:
Reinforcing bar system is positioned on the reinforcing bar processing space and concentrates processing in strict accordance with design drawing and relevant job specfication in advance according to construction schedule, and the reinforcing bar after the processing is neat according to the specifications and models classify and pile up.After reinforcing bar machined, according to the actual progress situation in scene, the arrangement of reinforcement situation according to the concreting section needs was transported to the construction operation face.
Reinforcing bar is taked artificial installation, on-the-spot colligation after being transported to the scope of operation.During reinforcement installation, after measuring went out control points such as center line, elevation, pile No. according to design drawing earlier, the mode of taking to install joint bar was laid the reinforcement installation skeleton.Carry out artificial mounting reinforcing steel bars according to design drawing then, adopt galvanized wire or electric welding to reinforce.
Reinforcing bar connects takes mechanical connection or manual electric arc welding according to actual conditions, and welding, mechanical connection and lapped length of steel bar must satisfy the related specifications requirement.
2. form work engineering construction:
In conjunction with wearing yellow tunnel engineering construction characteristic; Carry out the section engineering concrete construction of oblique hole after utilizing adit section engineering 9.0m needle beam chassis 2 to improve; In work progress, be divided into needle beam 17 and with die body 31 the relative motions walking take place, wherein needle beam 17 moves and relies on hoist engine 23 tractions that carry of former configuration 5t to move, and die body 31 is arranged and mainly relied on external force (2 5t hoist engines of outlet section engineering configuration) traction to move; The translational speed of tentatively drafting needle beam 17 is 9.0m/h, the translational speed 3.0m/h of die body 31.
3. concreting:
Concrete pouring construction takes order from bottom to top to carry out concrete pouring construction.
The I concrete warehousing:
The section engineering is provided with HZS60 concrete pump 4 apart from concreting section 20m place in oblique hole, adopts JTK1.8 * 1.6 type mine winch+board carriage+4m3 concrete delivery truck 6 to be transported to the position of concrete pump 4, puts in storage through concrete pump 4 and builds.
The II casting method:
A abutment wall and limit, end arch:
Concrete pouring construction adopts placement layer by layer, and being divided into thickness should not adopt φ 70mm, φ 50mm flexible axle poker vibrator to vibrate greater than 1.25 times of vibrating spear.The last layer that vibrates the time should insert down about one deck 5cm, eliminating the seam between two-layer, and vibrate and go up layer concrete and will before the lower-layer concrete initial set, carry out.Take the mode of " fast inserting pulled out slowly " to carry out when vibrating, should vibrating spear be twitched up and down in the process of vibrating, so that concrete vibrating is evenly closely knit up and down.
In the process of vibrating, each insertion point is the good vibrating time of GPRS all, and the too short vibration compacting that is difficult for longly possibly produce the concrete disintegration phenomenon again.The concrete vibrating standard all with concrete surface no longer significantly sink, no longer bubble occurs, the surface glows out mortar and is as the criterion.
When vibrating, should not and should not vibrate, and avoid colliding reinforcing bar, sealing etc. as far as possible greater than 0.5 times of the effect of vibrating near template apart from template.
B limit, crown:
For guaranteeing oblique hole section engineering concrete vibrating quality and effect, on the limit, crown installs attached vibrator.Note item in the work progress:
When attached vibrator uses, the outgoing cable line must not draw tension, more must not rupture.During operation, should observe earth leakage protective device and the ground connection or the connecting to neutral device of electric fixtures at any time and confirm qualified.
When attached vibrator was installed on the concrete blinding, each time of vibration should not surpass 1min, flowed or became the horizontal failure of oscillation that gets final product when concrete bleeding in mould, must not when the concrete initial set state, shake again.
It is fastening that the motor of attached vibrator and flat board should keep, and power line must be fixed on the flat board, and electric switch should be contained on the handgrip.
During the attached vibrator operation, flat board and concrete are kept in touch, make the effective vibration compacting concrete of the ripple that shakes, treat surperficial pulp, after no longer sinking, can slowly move forward, translational speed should be able to guarantee concrete jolt ramming pulp.
4. maintenance:
It is stripping between curing time that the back is accomplished in concreting, should take to water, spray that measure such as watering is preserved moisture, moist maintenance, the unlikely dehydration drying of assurance form joint place.Behind the stripping, continuing takes to water or cover measures such as watering carries out moist maintenance.
(5) template deformation monitoring:
For guaranteeing the concreting Forming Quality; In the work progress die body is carried out deformation monitoring; Establish eight monitoring points altogether in the cross section of needle beam chassis 2; With 45 ° of central angles corresponding arrange the monitoring point along the die body inner edge, be respectively: 1 of each 1, end arch about arch at the bottom of each 1, limit about each 1, stringcourse about 1 of crown, limit crown.
Deformation monitoring method: adopt total powerstation to be set up in known control point backsight known point orientation; Utilize the laser ranging function of come card TCR702 total powerstation to measure the measuring point position coordinate of laying then, the actual measurement radius that calculates institute measuring point position through program calculator carries out filling in of inclined shaft needle beam chassis die body deformation monitoring outcome table.
(6) technical safety measures:
In conjunction with the internal construction of full section needle beam chassis 2 and the actual conditions under the section engineering operation state of oblique hole,, draft and take following technical safety measures for guaranteeing the monolithic stability of full section needle beam chassis 2 in the section engineering concrete pouring construction process of oblique hole.
1. bracing or strutting arrangement:
Therefore I combines the state of needle beam chassis 2 in oblique hole section engineering because full section needle beam chassis 2 in the section engineering operation process of oblique hole, exists downslide component bigger; Back supporter 10 is set in the rear end of needle beam 17, is building coagulation section pre-embedded steel slab 9 simultaneously, pre-embedded steel slab 9 requires: steel plate thickness 2cm; Requirement is processed as radius 3.75m circular arc; Physical dimension: 40cm * 40cm, pre-embedded steel slab 9 is connected with back supporter 10, and the mode of taking to weld is fixed.
II after the assembly pulley conversion, draws die body 31 walkings because the mobile of die body 31 is 2 5t hoist engines that utilize the outlet section engineering to be provided with; So for preventing in die body 31 walking processes; Needle beam 17 is followed die body 31 walking forward together, and supporter 13 before the front end of needle beam chassis 2 is provided with, and preceding supporter 13 is reverse the support; Be connected with basement rock, simultaneously earth anchor 14 be set.
2. stopping means setting:
For guaranteeing needle beam chassis 2 in oblique hole section engineering operation safety, stopping means is divided into 2 part settings, and it is own with needle beam chassis 2 to be respectively trailer system.
The trailer system stopping means of I needle beam chassis 2:
For guaranteeing that haulage cable is not breaking away from pulley groove, therefore at the pulley groove place of needle beam chassis 2 and truss position assembly pulley stopping means is set respectively.Dynamometer is installed at assembly pulley place, the steel truss left and right sides respectively simultaneously,, is analyzed the safe condition of trailer system in the running through measuring the stressing conditions of assembly pulley.
The stopping means of II needle beam chassis 2 itself:
For preventing the crown hydraulic jack fracture of die body 31, take to utilize shaped steel to increase the mode that stopping means is set in die body framework 26 rear ends, be respectively longitudinal spacing device and cross spacing device, concrete form sees for details: the stopping means sketch map.
3. antiskid setting:
For guaranteeing needle beam chassis 2 trouble-free operation in oblique hole section engineering concrete construction, offset the downslide component of needle beam chassis 2 at 20 ° of oblique hole section engineering states, therefore draft the following measure of taking:
I is provided with 2 Φ, 28 antiskid wire rope at the parallel hole axis of the front end of needle beam 17, with outlet section engineering steel truss to being connected, the back support that utilizes the rear end of needle beam 17 to be provided with simultaneously;
II die body 31 downslide component are mainly through being provided with 12 Φ 21.5 haulage cables, and offset with the steel truss of die body framework 26 and outlet section setting, the mode that is connected of 2 5t hoist engines respectively.
4. safety guard net setting:
Because full section needle beam platform: 2 are in 20 ° of inclined-plane states in oblique hole section engineering; The constructor constructs or walks on needle beam chassis 2 and exists than big potential safety hazard; Combine this bid section engineering actual conditions simultaneously, adit section and the lower horizontal section engineering construction of oblique hole need escape way.Therefore for guaranteeing safety, draft to take following safety prevention measure:
According to the structure of full section needle beam chassis 2, four layers white woollen goods rope safety net is set at the rear end part upper, middle and lower and the base plate of the die body framework 26 of needle beam chassis 2, the rear end of the die body framework 26 of needle beam chassis 2 is sealed.
Safety guard net is installed: at first the rearward end at the die body framework 26 of needle beam chassis 2 adopts Φ 22 reinforcing bars steel frame to be set and on the reinforcement ring of die body framework 26 rear ends, hook to be set; Take artificial mode of installing to carry out white woollen goods netting then and install, safety guard net height 1.5m (specifically confirming) according to bulk.For guaranteeing the construction of adit section engineering and lower horizontal section, the import and export passage is set in the centre position, bottom of template 31.
5. antiskid plate setting:
For guaranteeing constructor's safety in the section engineering concrete pouring construction process of oblique hole, on needle beam chassis 2, divide upper, middle and lower-ranking that antiskid plate is set.Antiskid plate adopts the thick plank of 5mm, reeding is set, reeding spacing 30cm on antiskid plate.Antiskid plate must be connected firmly with shaped steel, connects into integral body with full section needle beam chassis 2.
Claims (10)
1. method of carrying out the heavy grade slope construction with full section needle beam chassis; Said full section needle beam chassis comprises needle beam and die body; Said needle beam places in the die body framework of said die body and can do with respect to the moving axially of said die body, and the angle between said heavy grade inclined shaft and the horizontal plane is greater than 10 °; It is characterized in that: said method comprises needle beam guidance method, needle beam chassis traction method, needle beam chassis fixing method and concreting method; In the said needle beam guidance method, the assembly pulley of said needle beam adopts 8 sections guiding wire rope to accomplish the guiding of said needle beam; Said needle beam chassis traction method is: the both sides at said die body framework are provided with movable pulley; Outlet section both sides at said heavy grade inclined shaft are provided with hoist engine; On said hoist engine, running block is installed, is adopted 6 sections haulage cables between movable pulley on the said die body framework of homonymy and the running block on the said hoist engine; Said needle beam chassis fixing method comprises:
(1) in the both sides of the die body framework of said full section needle beam chassis junction plate is set vertically; Said die body framework is connected to integral body; (2) in the rear end of said needle beam and the front end of said full section needle beam chassis supporter is set; (3) at the pulley groove place of the movable pulley of the assembly pulley of said needle beam and said die body framework limiting plate is set, dynamometer is installed in the running block position on said hoist engine, at said die body back-end framework limiting plate is set; (4) the outlet section medium position at said heavy grade inclined shaft is provided with steel truss, between the front end of said needle beam and said steel truss, the antiskid wire rope is set; Said concreting method is: the concrete in the concrete delivery truck is pumped in the said full section needle beam chassis one-time-concreting moulding in a segmentation through delivery pump.
2. the full section needle beam of usefulness according to claim 1 chassis carries out the method for heavy grade slope construction, it is characterized in that: in the said needle beam guidance method, the assembly pulley of said needle beam adopts two two-wheel pulleys and three gin blocks to unite the formation operational system; In the said needle beam chassis traction method, a three-wheel movable pulley respectively is set, two two-wheel movable pulley is installed on a said hoist engine is formed running block in the both sides of said die body framework; In the said needle beam chassis fixing method, between the front end of said needle beam and said steel truss, two parallel antiskid wire rope are set.
3. the full section needle beam of usefulness according to claim 1 chassis carries out the method for heavy grade slope construction, and it is characterized in that: the angle between said heavy grade inclined shaft and the horizontal plane is 20 °.
4. the full section needle beam of a usefulness as claimed in claim 1 chassis carries out the needle beam chassis that the method for heavy grade slope construction adopts; It is characterized in that: comprise the needle beam guiding device; Said needle beam guiding device comprises two two-wheel pulleys, three gin blocks and the wire rope that leads; Said two two-wheel pulleys are installed on the said needle beam truss side by side; Said three gin blocks are installed on the said needle beam truss relative with said two two-wheel pulleys side by side; Said guiding wire rope from fixed end begin to walk around successively behind first two-wheel pulley, first gin block, first two-wheel pulley, second gin block, second two-wheel pulley, the 3rd gin block, second two-wheel pulley and the hauling block with said full section needle beam chassis on the hoist engine that carries be connected, said guiding wire rope forms 8 sections altogether.
5. needle beam chassis according to claim 4; It is characterized in that: said needle beam chassis also comprises needle beam chassis draw-gear; Said needle beam chassis draw-gear comprises two three-wheel movable pulley, four two-wheel movable pulley, hoist engine and haulage cables; Two said three-wheel movable pulley are arranged at the both sides of said die body framework respectively; Said hoist engine is two, is installed on the outlet section both sides of said heavy grade inclined shaft respectively, and two are one group and are installed on the said hoist engine in the said two-wheel movable pulley; Connect through said haulage cable between three-wheel movable pulley on the said die body framework of homonymy and the two-wheel running block on the said hoist engine, said haulage cable forms 6 sections altogether.
6. needle beam chassis according to claim 4; It is characterized in that: said needle beam chassis also comprises needle beam chassis securing device; Said needle beam chassis securing device comprises the truss reinforcement device; Said truss reinforcement device comprises 8 i iron, and 4 is one group in said 8 i iron, is arranged at the upper and lower two-layer of said die body framework both sides respectively.
7. needle beam chassis according to claim 6; It is characterized in that: said needle beam chassis securing device also comprises bracing or strutting arrangement; Said bracing or strutting arrangement comprises that earth anchor, preceding supporter, preceding support are very heavy, pre-embedded steel slab, back supporter and back are supported very heavy; The two ends of supporter are connected with said earth anchor with said needle beam chassis front center respectively before said, and the middle part of said preceding supporter is connected through supporting very heavy and said needle beam chassis front end bottom before said, and said earth anchor is arranged in the basement rock; The two ends of said back supporter are connected with said pre-embedded steel slab with said needle beam upper rear end respectively, and the middle part of said back supporter is supported middle part, very heavy and said needle beam rear end through said back and is connected, and said pre-embedded steel slab is arranged in the concreting.
8. needle beam chassis according to claim 6; It is characterized in that: said needle beam chassis securing device also comprises stopping means; Said stopping means comprises spacing i iron and dynamometer; Said spacing i iron comprises polylith, is installed on pulley groove place and the rear end of said die body framework of the movable pulley of the pulley groove place of the assembly pulley of said needle beam, said die body framework respectively, and said dynamometer is installed on the assembly pulley position on the said hoist engine.
9. needle beam chassis according to claim 6; It is characterized in that: said needle beam chassis securing device also comprises friction skidding device; Said friction skidding device comprises anti-skidding wire rope and steel truss; Said steel truss is arranged at the outlet section middle part of said heavy grade inclined shaft, and said antiskid wire rope is installed between the front end and said steel truss of said needle beam.
10. needle beam chassis according to claim 9 is characterized in that: said antiskid wire rope is two of being parallel to each other and coaxial with said needle beam chassis.
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| CN109335980A (en) * | 2018-09-29 | 2019-02-15 | 中铁十六局集团铁运工程有限公司 | A kind of high slope building stones transport device and method |
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| US9670038B2 (en) | 2013-05-10 | 2017-06-06 | Devin International, Inc. | Drilling rig transfer system and method |
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| CN108678778A (en) * | 2018-05-09 | 2018-10-19 | 中铁十二局集团第二工程有限公司 | Heavy grade inclined shaft Second Lining Construction method |
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