CN113666280A - Method for manufacturing and hoisting reinforcement cage for impervious wall construction - Google Patents
Method for manufacturing and hoisting reinforcement cage for impervious wall construction Download PDFInfo
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- CN113666280A CN113666280A CN202110956941.2A CN202110956941A CN113666280A CN 113666280 A CN113666280 A CN 113666280A CN 202110956941 A CN202110956941 A CN 202110956941A CN 113666280 A CN113666280 A CN 113666280A
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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
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
Abstract
The invention discloses a method for manufacturing a reinforcement cage for diaphragm wall construction, which comprises the following steps: positioning the sizes of the top and the bottom of the reinforcement cage, and placing horizontally distributed reinforcements according to a first design interval; the distribution marks of the main reinforcements of the reinforcement cage are carved on the platform according to a second design interval, then the main reinforcements of the reinforcement cage are placed according to the second design interval, the main reinforcements on the bottom surface are connected, and then spot welding is performed firmly; welding truss ribs; binding a grouting pipe; arranging top main ribs according to design requirements; arranging horizontal distribution ribs according to design requirements, and firmly performing spot welding; and installing a sealing rib and firmly welding. The invention discloses a method for hoisting a reinforcement cage for impervious wall construction. The manufacturing method of the reinforcement cage for the impervious wall construction aims to solve the problem of low efficiency in the manufacturing and hoisting processes of the reinforcement cage.
Description
Technical Field
The invention belongs to the technical field of cut-off wall construction, and particularly relates to a method for manufacturing and hoisting a reinforcement cage for cut-off wall construction.
Background
The diaphragm wall is an underground continuous wall which is built in a loose permeable layer or an earth-rock dam and plays a role in seepage control, and is widely applied to the earth-rock dam and foundation pit treatment with seepage control pressure because of the advantages of reliable structure, good seepage control effect, adaptability to various stratum conditions, simplicity and convenience in construction, low cost and the like, thereby greatly improving seepage control and safety performance.
Usually, because construction space limits and hoisting mechanical property limits, the steel reinforcement cage can not be hoisted integrally, so the steel reinforcement cage needs to be manufactured in sections and hoisted in sections, and when the steel reinforcement cage is placed in a groove, namely, when the steel reinforcement cage is placed down, the steel reinforcement cage is connected at the groove section surface. Generally, the reinforcement cage manufactured in sections and hoisted in sections comprises at least two reinforcement cage units, and the reinforcement cage units are connected end to end, so that the efficiency of the manufacturing method is low, and the construction period in the construction embodiment is influenced.
In view of the above, it is desirable to provide a method for manufacturing and hoisting a reinforcement cage for cut-off wall construction to solve the above problems.
Disclosure of Invention
Technical problem to be solved
The invention solves the technical problem of lower efficiency in the processes of manufacturing and hoisting the reinforcement cage.
(II) technical scheme
The invention provides a method for manufacturing a reinforcement cage for diaphragm wall construction, which comprises the following steps:
positioning the sizes of the top and the bottom of the reinforcement cage, and placing horizontally distributed reinforcements according to a first design interval;
the distribution marks of the main reinforcements of the reinforcement cage are carved on the platform according to a second design interval, then the main reinforcements of the reinforcement cage are placed according to the second design interval, the main reinforcements on the bottom surface are connected, and then spot welding is performed firmly;
welding truss ribs;
binding a grouting pipe;
arranging top main ribs according to design requirements;
arranging horizontal distribution ribs according to design requirements, and firmly performing spot welding;
and installing a sealing rib and firmly welding.
Furthermore, the steel reinforcement cage protective layer is arranged according to vertical interval 3 ~ 5m and is welded the inside and outside both sides of steel reinforcement cage owner muscle.
Furthermore, the bottom end of the longitudinal steel bar is away from the bottom of the groove by a set distance, and the bottom end of the steel bar is bent inwards.
Furthermore, the horizontal section shape of the reinforcement cage is manufactured according to the shape of the groove section, and the length of the reinforcement cage is matched with the depth of the groove section.
Furthermore, the longitudinal steel bars are connected by adopting a connector sleeve, the axes of the steel bars are on the same straight line, the area of the joint of the same section is less than or equal to 50% of the area of the section, and the longitudinal steel bars are arranged at intervals.
Further, 50% staggered spot welding is adopted for the intersection point in the middle of the reinforcement cage.
The invention also provides a hoisting method of the reinforcement cage for the construction of the impervious wall, which comprises the following steps:
the double cranes are in place, after the installation condition and the stress gravity center of the steel wire ropes of the two cranes are checked, the two cranes start to horizontally lift the steel reinforcement cage from the steel reinforcement cage platform at the same time;
the double machines horizontally lift the reinforcement cage for a set distance, the main lifting hook commands the auxiliary machine to cooperate with the lifting hook according to the distance between the tail part of the reinforcement cage and the ground; the main crane and the auxiliary crane continue to be lifted, and when the reinforcement cage is lifted to a set height, the auxiliary crane stops lifting;
the main hoisting hook and the auxiliary hoisting hook operate until the main hoisting hook hoists the reinforcement cage;
the auxiliary hoisting hook is used for completely hoisting the reinforcement cage by the main hoisting;
and the main crane moves the reinforcement cage to the groove opening for accurate alignment, and then the reinforcement cage is placed into the groove and butted with the groove opening.
Furthermore, the section is divided by taking a set value as a boundary in the hoisting process.
Furthermore, ten hoisting points are adopted for hoisting in the hoisting process, and the hoisting points are arranged on the principle that the bending moment borne by the reinforcement cage in the hoisting process is the minimum.
Furthermore, the hanging point position is locally encrypted in a cross brace X mode.
(III) advantageous effects
According to the manufacturing method of the reinforcement cage for the impervious wall construction, provided by the invention, the reinforcement cage of each groove section is processed strictly according to the requirements of design drawings, and the number of the trusses is processed and welded according to the requirements of the design drawings, so that the integral rigidity, strength and stability of the reinforcement cage during hoisting are ensured. By adopting the integral manufacturing mode, compared with a sectional manufacturing mode, the manufacturing time can be saved, and the manufacturing efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be hoisted in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for manufacturing a reinforcement cage for diaphragm wall construction according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a method for hoisting a reinforcement cage for diaphragm wall construction according to an embodiment of the present invention;
fig. 3 is a schematic diagram of arrangement of hoisting points in a method for hoisting a reinforcement cage for diaphragm wall construction according to an embodiment of the present invention;
fig. 4 is a schematic lifting diagram in a reinforcement cage lifting method for cut-off wall construction provided by an embodiment of the invention.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, alterations, and improvements in the parts, components, and connections without departing from the spirit of the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.
The invention provides a method for manufacturing a reinforcement cage for diaphragm wall construction, which comprises the following steps of:
s101, positioning the sizes of the top and the bottom of the reinforcement cage, and placing horizontally distributed reinforcements according to a first design interval;
s102, marking the distribution marks of the main reinforcements of the reinforcement cage on the platform according to a second design interval, then placing the main reinforcements of the reinforcement cage at the second design interval, connecting the main reinforcements at the bottom surface, and then firmly performing spot welding;
s103, welding truss ribs;
s104, binding a grouting pipe;
s105, arranging top main ribs according to design requirements;
s106, arranging horizontal distribution ribs according to design requirements, and performing spot welding firmly;
and S107, mounting a sealing rib, and firmly welding.
In the above embodiment, the processing of each groove section steel reinforcement cage is strictly performed according to the requirements of design drawings, and the number of the trusses is processed and welded according to the requirements of the design drawings so as to ensure the integral rigidity, strength and stability of the steel reinforcement cage during hoisting. By adopting the integral manufacturing mode, compared with a sectional manufacturing mode, the manufacturing time can be saved, and the manufacturing efficiency is improved.
In the embodiment, 3 reinforcing steel bar fields are arranged and are uniformly arranged on the downstream side of the axis of the impervious wall, each occupied area is 25m multiplied by 75m, the 1# reinforcing steel bar field is positioned at the position D0+320.00, the manufacturing and installation of the impervious wall reinforcing cages of the 1# construction platform, the 2# construction platform and the 3# construction platform are met, the difference of the 3# construction platform and the 4# construction platform is 15m, the safety of the crawler crane during carrying and traveling is considered, the 2# reinforcing steel bar field is arranged and positioned at the position D0+400.00, the 3# reinforcing steel bar field is positioned at the position D0+500.00, and the requirements of the 5# construction platform and the 6# construction platform on the right bank are met.
After the reinforcement cage is formed, temporarily binding iron wires and completely removing the iron wires so as to prevent the walls of the reinforcement cage from being damaged by hanging when the reinforcement cage is taken down; when the reinforcement cage is manufactured, the reinforcement pile is pre-positioned on the manufacturing platform so as to improve the working efficiency and ensure the manufacturing quality; the manufactured reinforcement cage needs to meet the requirements of design and current specifications. Preparing an arc welding machine, a spot welding machine, a steel bar cutting machine, a steel bar bending machine and the like before construction; and the steel bar is qualified after rechecking. The error of the spacing between the main reinforcements is +/-10 mm, the error of the spacing between the stirrups is +/-20 mm, the thickness of the reinforcement cage is 0-minus 10mm, the width is +/-20 mm, and the length is +/-50 mm.
In some optional embodiments, the reinforcement cage protection layers are arranged in a mode that one reinforcement cage protection layer is welded on the inner side and the outer side of a main reinforcement of a reinforcement cage according to the vertical distance of 3-5 m. Specifically, the maximum length of the underground cut-off wall reinforcement cage is about 53.2m, the width of the standard section is about 6.8m, and in order to ensure the processing and installation quality of the reinforcement cage, the schemes of manufacturing by pieces, fixing by layering the orifices and hoisting and anchoring are adopted.
When the reinforcement cage is processed and manufactured, the steel hoops are arranged orderly, then the vertical main reinforcements sequentially penetrate into the steel hoops (the vertical main reinforcements are in staggered lap joint at intervals), the steel hoops are in place by adopting interval spot welding, and the positioning is accurate.
In some alternative embodiments, the bottom ends of the longitudinal bars are spaced from the bottom of the groove, with the bottom ends of the bars being bent inward. Specifically, the set pitch may be selected to be 20 cm.
In some alternative embodiments, the horizontal cross-sectional shape of the reinforcement cage is made according to the shape of the groove section, and the length of the reinforcement cage is matched with the depth of the groove section.
In some optional embodiments, the longitudinal steel bars are connected by a connector sleeve, the axes of the steel bars are on a straight line, the joint area of the same section is less than or equal to 50% of the section area, and the longitudinal steel bars are arranged at intervals.
In some alternative embodiments, 50% staggered spot welding is used for the intersection point between the reinforcement cages.
The invention also provides a hoisting method of the reinforcement cage for the construction of the impervious wall, which comprises the following steps as shown in figure 2:
s201, positioning the two cranes, after checking the installation condition and the stress gravity center of the steel wire ropes of the two cranes, starting to simultaneously horizontally hoist, and lifting the steel reinforcement cage away from the steel reinforcement cage platform;
s202, the double machines horizontally lift the steel reinforcement cage for a set distance, the main lifting hook commands the auxiliary machine to cooperate with the lifting hook according to the distance between the tail part of the steel reinforcement cage and the ground; the main crane and the auxiliary crane continue to be lifted, and when the reinforcement cage is lifted to a set height, the auxiliary crane stops lifting;
s203, installing a main hoisting hook and an auxiliary hoisting hook for operation until the main hoisting hook is installed to hoist the reinforcement cage;
s204, installing an auxiliary hoisting and unloading hook, and completely hoisting the reinforcing cage by installing a main hoisting;
s205, the main crane moves the reinforcing cage to the slotted hole opening for accurate alignment, and the reinforcing cage is placed into the slot and butted with the slotted hole opening.
In the embodiment, the on-site road is rolled and is an original stratum, the road surface is flat, firm and stable, and has enough bearing capacity, so that the walking requirement of the crawler crane is met.
In the embodiment, the main crane adopts a 260t crawler crane, the length of the mast is 64m, the lifting capacity is 76.1t at the optimal angle, and the requirement is completely met according to the most unfavorable condition, namely the weight of the largest reinforcement cage (31.5m) is 17.4t, and the crawler crane walks with load.
The selection of the hoisting machine is carried out according to the following schemes:
firstly, arranging a lifting point:
(1) open-width longitudinal hanging point
As shown in fig. 3, according to the suspension point calculation formula: + M ═ M;
wherein: + M ═ (1/2) qL1 2；-M＝(1/8)qL2 2-(1/2)qL1 2；
q is uniform load, and M is bending moment.
Therefore, the method comprises the following steps:
2L1+4L2h (H is the reinforcement cage height).
Calculating to obtain: l is1＝0.075H，L2＝0.212H。
Taking a 30m steel reinforcement cage as an example, L is known1＝2.25m，L26.36 m. Therefore, the bending moment when the reinforcement cage is lifted is the smallest when the points A (B) and C, D, E, F are selected.
(2) Open-width transverse hoisting point
According to a lifting point calculation formula: + M ═ M;
wherein: + M ═ (1/2) qL1 2；-M＝(1/8)qL2 2-(1/2)qL1 2；
q is uniform load, and M is bending moment.
Therefore, the method comprises the following steps:
2L1+L2l (L is the reinforcement cage width);
through calculation: since L1 is 0.207L and L2 is 0.586L, the lateral hanging point is preferably located at the left and right 0.207L positions.
According to technical data and practical hoisting experience: the AB section is 7.0m, the BC section is 7.0m, the CD section is 5.74m, the DE section is 7.0m, the point A is the top of the reinforcement cage, and the distance from the lifting point E to the bottom of the reinforcement cage is 2.0 m.
In the embodiment, the maximum cage length of the reinforcement cage is 60m, the weight of the reinforcement cage reaches 34.6 tons, the lengths of the sections from the bottom of the cage to the top of the cage are 30m and 30m, and the weight of each section of the reinforcement cage is 17.3 tons.
Through calculation: t is1＝3.37t，T23.60 t. Stress T of auxiliary hoisting steel wire rope1 2＝3.6/sin60°＝4.16t。
The stress is larger along with the increase of the angle in the straightening process of the reinforcement cage, so the maximum stress of the auxiliary crane is considered to be 2T1 2The estimated weight of the wire rope and the carrying pole is 4t when the weight is 8.32t, so the auxiliary crane stress is 12.32 t. The main crane has the largest stress when the steel reinforcement cage is upright, and the weight of the steel wire rope and the shoulder pole is estimated to be 4t, so that the stress of the main crane is 21.3t, and the stress of the main crane is 38.6t after the orifice is butted.
Model selection and checking calculation for crawler crane
In the embodiment, the maximum cage length of the steel reinforcement cage is 60m, the weight of the steel reinforcement cage reaches 34.6 tons, 2 sections are divided, and each section is 30.0m long, so that according to the hoisting performance parameters of the crawler crane, 260t of the crawler crane is used for a main crane of the crawler crane, and 100t of the crawler crane is used for an auxiliary crane.
(1) Checking calculation for horizontal hoisting reinforcement cage
According to the actual working surface on site, the working amplitude of a main crane is 15m at 260t, the length of a suspender of the crane is extended to 65m, and the maximum lifting capacity is 55.2t under the condition of a turning radius of 16 m.
According to the technical specification JGJ276-2012 for hoisting safety in building construction, the load of a single machine of the double-machine hoisting is not more than 80% of the rated hoisting capacity.
When the reinforcement cage is lifted in a flat manner, the load of the main crane is 3 multiplied by 3.37 and 4, 14.11t is less than 55.2 multiplied by 80, 44.2t (lifting radius 16m, angle 79 degrees).
The working amplitude of the 100t auxiliary crane is considered as 12m, the suspender of the crane is lengthened to 42m, and the maximum lifting capacity is 35.4t in the case.
According to the technical specification JGJ276-2012 for hoisting safety in building construction, the load of a single machine of the double-machine hoisting is not more than 80% of the rated hoisting capacity.
The auxiliary hoisting load is 2 × 3.60+4 ═ 11.2t < 35.4 × 80 ═ 28.3t (hoisting radius 12m, angle 79 °).
Therefore, when the reinforcement cage is horizontally hung, the types of the main crane and the auxiliary crane can meet the hoisting requirement.
(2) Maximum load checking
The main crane has the maximum load when the reinforcement cage is vertical, according to the safety operation regulations of crawler cranes (DL/T5248-.
The stress of the auxiliary crane is changed along with the increase of the angle in the process of straightening the reinforcement cage, the stress is gradually increased, after the auxiliary crane reaches a certain angle, the stress is gradually reduced, and finally the main crane is completely stressed, and according to the construction experience in similar embodiments, the maximum stress of the auxiliary crane is considered to be 80% of the total weight of the reinforcement cage. The auxiliary crane approaches the main crane in the hoisting process and is reduced by 70 percent.
Then 17.3 × 80%: 13.84t < 35.4 × 70%: 24.8t (lifting radius 12m, angle 79 °).
From the calculation, the main crane and the auxiliary crane meet the hoisting requirements.
(3) Checking calculation of length of main hanging rod
As shown in fig. 4, according to the schematic view of the crawler crane, then:
AC＝AB×tan79°＝3.5m×tan79°＝18m；
CF＝18+30+1＝49m；
CD＝CF/sin79°＝49.9m；
the main arm shaft is 2.50m away from the ground by checking the outline dimension chart, namely:
OE＝2.50m；
OD＝OE/sin79°＝2.55m；
finally, the following results are obtained: OC-CD-OD 49.9-2.55 47.35m < 64m, which satisfies the requirement.
(4) Checking calculation for main and auxiliary crane shoulder pole beam
1) Checking calculation of main hanging shoulder pole
The method comprises the following steps: length 4.5m, thickness 0.05m, height 0.66 m.
The strength stress born by the round hole hoisting point of the main hoisting shoulder pole is as follows:
sigma-KG/BH 2 × 34.6 × 1000 × 9.8/145/50 93.54<194N/mm2 (steel plate tensile strength value, safety factor K2)
2) Checking calculation of auxiliary hanging shoulder pole
The method comprises the following steps: length 4.5m, thickness 0.05m, height 0.50 m.
The auxiliary hanging carrying pole bears 80% of the weight of the steel reinforcement cage, and the round hole hanging point bears the strength stress:
sigma-KG/BH 2 × 17.3 × 80% × 1000 × 9.8/65/50-83.47 <194N/mm2 (steel plate tensile strength value, safety factor K2)
In the embodiment, the weight of the hoisting reinforcement cage is 34.6t, so that the hoisting requirements of the main carrying pole hoisting point and the auxiliary carrying pole hoisting point can be met.
(5) Checking calculation of hanging point and hanging bar
The round steel of 32 is adopted in this embodiment to do and hangs the muscle, and the tensile strength of round steel is 210N/mm2, and its stretching resistance: 3.14 × 32 × 32/4 × 210 equals 168.8KN equals 16.9t, and 4 suspension bars are arranged in each reinforcement cage, so that the bearing capacity is 67.6t, the reinforcement cage is 34.6t in the whole body, and the safety factor is 1.95.
In this embodiment, 28 round steel is used as a hoisting point, the shear strength of the round steel is 120N/mm2, and the shear resistance is as follows: 3.14 × 28 × 28/4 × 120 equals 73.9KN equals 7.39t, 34.6t in the whole reinforcement cage is borne by 6 hoisting points, and each hoisting point shares 34.6 ÷ 6 ÷ 5.76t < 7.39 t.
(6) Shackle and pulley checking
The shackle is selected according to the maximum stress of the main and auxiliary hoisting steel wire ropes. When the main hoisting shackle is stressed maximally, and the auxiliary hoisting shackle is stressed maximally, the weight of the auxiliary hoisting shackle is 80% of the weight of the reinforcement cage when the reinforcement cage is horizontally placed and hoisted.
1) Main crane shackle and pulley selection
The upper part of the main lifting carrying pole is broken off: p1 ═ 22.3t, (34.6+4)/2sin60 °, high tensile shackle 50 t: 2, only.
The lower part of the main lifting carrying pole is broken off: p2 ═ (34.6+4)/2 ═ 19.3t, 2 high tensile shackle of 40t were selected; 2 pulleys are arranged below the main lifting carrying pole, and the bearing capacity is 30 t.
The total 6 shackles of the main hoisting point bear the weight of 17.3 tons of reinforcement cages (without rigging), the load P borne by each shackle is 17.3/6-5.77 t, and 10 20t high-strength shackles are adopted.
2) Auxiliary crane shackle and pulley selection
And (3) shackle of the upper part of the carrying pole of the auxiliary crane: according to calculation, the maximum auxiliary hoisting force is 17.3 multiplied by 80 percent to 13.84 t. P3-13.84/2 sin60 ° -7.99 t. Selecting a high-strength shackle 40 t: 2 pieces of the Chinese herbal medicines.
And (3) shackle of the lower part of the carrying pole of the auxiliary crane: p3 ═ 13.84/2 ═ 6.92 t. Selecting a high-strength shackle 20 t: 2 pieces of the Chinese herbal medicines. 2 pulleys are arranged below the auxiliary hanging carrying pole, and the bearing capacity is 20 t.
The auxiliary hoisting points bear the weight of 13.84 tons of reinforcement cages (without rigging) by 4 shackles, the load P borne by each shackle is 13.84/4 and 3.46t, and 4 shackles with 20t and high strength are adopted.
(7) Calculation of wire rope strength (1400 MPa for nominal tensile strength)
1) Checking calculation of steel wire rope on upper part of carrying pole of main crane
The main hoisting steel wire rope for hoisting the steel reinforcement cage is supposed to use 2 steel wire ropes of 6 multiplied by 37 and 1 with the diameter of 52mm, the length of a single steel wire rope is 6m, the number of the steel wire ropes is 1 on each side, and the cross sectional area of the steel wire rope is 1003.8mm2And breaking tension 1152.1KN (117.6t) (obtained by a general calculation manual for hoisting and hoisting).
The steel wire rope is stressed maximally when the steel reinforcement cage is in a vertical state, and at the moment, two steel wire ropes S on the upper portion of the shoulder pole are (P +4)/4sin60 degrees, 11.14t (Sb) 117.6t/8 (14.7 t) and meet the requirement. (P31.53T, rigging 4T, wire rope tolerance factor of 8).
2) Checking calculation of steel wire rope at lower part of carrying pole of main crane
The steel wire rope at the lower part of the shoulder pole adopts 4 steel wire ropes of 6 multiplied by 37 and 1 with the diameter of 52mm, and the cross sectional area of the steel wire rope is 1003.8mm2And breaking tension 1152.1KN (117.6t) (obtained by a general calculation manual for hoisting and hoisting).
P1, P2, P3, P4, P/4, 8.65t, Sb, 117.6/8, 14.7t (the permissible safety factor of the steel wire rope is 8).
Therefore, the steel wire rope selected by the main crane meets the requirement.
3) Checking calculation of upper steel wire rope of auxiliary hanging shoulder pole
The auxiliary hoisting steel wire rope for hoisting the steel reinforcement cage is supposed to use a 6 multiplied by 37+1 steel wire rope with the diameter of 43mm, the length of a single steel wire rope is 6m, 1 steel wire rope is respectively arranged at two sides, the total number of the steel wire ropes is 2, and the cross sectional area of the steel wire rope is 697.08mm2And breaking tension 799.9KN (81.6t) (found by a common calculation manual for hoisting and hoisting).
The auxiliary hoisting weight is taken as 80% of the weight of the reinforcement cage, and the weight of the reinforcement cage is 34.6 t. S ═ 7.92 × 80% +4)/4 ═ 7.92t <81.6/8 ═ 10.2t (weight of steel reinforcement cage 34.6t, rigging 4t, allowable safety factor of steel rope is 8).
4) Checking calculation of steel wire rope at lower part of shoulder pole
The lower part of the auxiliary hanging shoulder pole adopts 26 multiplied by 37 plus 1 steel wire ropes with the diameter of 36.5mm, the length of each steel wire rope is 12m, and the cross sectional area of each steel wire rope is 503.64mm2And breaking tension 578.1KN (59.0t) (obtained by a general calculation manual for hoisting and hoisting).
The weight of the auxiliary hoisting weight is taken as 80 percent of the weight of the reinforcement cage, the weight of the reinforcement cage is 34.6t, the stress of the steel wire rope P1 is P2 is P3 is P4 is P/4 is 34.6 multiplied by 80 percent/4 is 6.92t, S is 6.92t is Sb 59.0/8 is 7.37t (the allowable safety factor of the steel wire rope is 8)
Therefore, the steel wire rope selected by the auxiliary crane meets the requirement.
In some optional embodiments, the section is divided by taking a set value as a boundary in the hoisting process. Wherein, each groove section steel reinforcement cage is different in length, in order to increase the whole rigidity of steel reinforcement cage in the lifting process, the reasonable segmentation, generally regard 31.5m as the boundary segmentation.
In some optional embodiments, ten hoisting points are adopted for hoisting in the hoisting process, and the hoisting points are arranged on the principle that the bending moment borne by the reinforcement cage in the hoisting process is the minimum. Specifically, the arrangement is to increase the overall rigidity of the reinforcement cage in the hoisting process.
In some alternative embodiments, the suspension point locations are partially encrypted in the form of a scissor brace X. Specifically, the arrangement is to increase the overall rigidity of the reinforcement cage in the hoisting process.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and alterations to this application will become apparent to those skilled in the art without departing from the scope of this invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A method for manufacturing a reinforcement cage for impervious wall construction is characterized by comprising the following steps:
positioning the sizes of the top and the bottom of the reinforcement cage, and placing horizontally distributed reinforcements according to a first design interval;
the distribution marks of the main reinforcements of the reinforcement cage are carved on the platform according to a second design interval, then the main reinforcements of the reinforcement cage are placed according to the second design interval, the main reinforcements on the bottom surface are connected, and then spot welding is performed firmly;
welding truss ribs;
binding a grouting pipe;
arranging top main ribs according to design requirements;
arranging horizontal distribution ribs according to design requirements, and firmly performing spot welding;
and installing a sealing rib and firmly welding.
2. The method for manufacturing the reinforcement cage for the cut-off wall construction according to claim 1, wherein the reinforcement cage protective layers are welded on the inner side and the outer side of the main reinforcement of the reinforcement cage according to the arrangement of 3-5 m vertical intervals.
3. The method for manufacturing a reinforcement cage for diaphragm wall construction as claimed in claim 1, wherein the bottom ends of the longitudinal reinforcements are spaced from the bottom of the groove by a predetermined distance, and the bottom ends of the reinforcements are bent inward.
4. The method for manufacturing a reinforcement cage for diaphragm wall construction as claimed in claim 1, wherein the horizontal cross-sectional shape of the reinforcement cage is manufactured according to the shape of the groove section, and the length of the reinforcement cage is adapted to the depth of the groove section.
5. The method for manufacturing the reinforcement cage for the construction of the impervious wall according to claim 1, wherein the longitudinal reinforcements are connected by a connector sleeve, the axes of the reinforcements are on a straight line, and the area of the joint of the same section is less than or equal to 50% of the area of the section and the joints are arranged at intervals.
6. The method for manufacturing a reinforcement cage for diaphragm wall construction according to claim 1, wherein 50% staggered spot welding is adopted for the middle crossing point of the reinforcement cage.
7. A hoisting method of a reinforcement cage manufactured by the method for manufacturing the reinforcement cage for the construction of the impervious wall according to any one of claims 1 to 6, which comprises the following steps:
the double cranes are in place, after the installation condition and the stress gravity center of the steel wire ropes of the two cranes are checked, the two cranes start to horizontally lift the steel reinforcement cage from the steel reinforcement cage platform at the same time;
the double machines horizontally lift the reinforcement cage for a set distance, the main lifting hook commands the auxiliary machine to cooperate with the lifting hook according to the distance between the tail part of the reinforcement cage and the ground; the main crane and the auxiliary crane continue to be lifted, and when the reinforcement cage is lifted to a set height, the auxiliary crane stops lifting;
the main hoisting hook and the auxiliary hoisting hook operate until the main hoisting hook hoists the reinforcement cage;
the auxiliary hoisting hook is used for completely hoisting the reinforcement cage by the main hoisting;
and the main crane moves the reinforcement cage to the groove opening for accurate alignment, and then the reinforcement cage is placed into the groove and butted with the groove opening.
8. The method for hoisting the reinforcement cage for the cut-off wall construction according to claim 7, wherein the section is defined by a set value during hoisting.
9. The method for hoisting the reinforcement cage for the diaphragm wall construction according to claim 7, wherein ten hoisting points are adopted for hoisting in the hoisting process, and the hoisting points are arranged on the basis of the minimum bending moment applied to the reinforcement cage in the hoisting process.
10. The method for hoisting the reinforcement cage for the cut-off wall construction according to claim 7, wherein the hoisting point is partially encrypted in a cross brace X manner.
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| CN202110956941.2A CN113666280A (en) | 2021-08-19 | 2021-08-19 | Method for manufacturing and hoisting reinforcement cage for impervious wall construction |
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| CN202110956941.2A CN113666280A (en) | 2021-08-19 | 2021-08-19 | Method for manufacturing and hoisting reinforcement cage for impervious wall construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114453867A (en) * | 2021-12-02 | 2022-05-10 | 中国华冶科工集团有限公司 | Construction method of desorption tower |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05214813A (en) * | 1992-02-05 | 1993-08-24 | Kajima Corp | Suspension jig for reinforcing cage |
| CN101245595A (en) * | 2008-03-18 | 2008-08-20 | 启东建筑集团有限公司 | Method for manufacturing big diameter borehole filling pile cage of reinforcement |
| CN103572765A (en) * | 2013-11-19 | 2014-02-12 | 成军 | Treatment and construction method of bridge site river bank expansive soil landslide positions |
| CN108677922A (en) * | 2018-06-07 | 2018-10-19 | 中铁二局第工程有限公司 | A kind of fabrication of reinforcing cage and installation method |
| WO2020244676A1 (en) * | 2019-11-27 | 2020-12-10 | 中铁九局集团有限公司 | Steel reinforcement cage for use in ventilation shaft diaphragm wall, and usage method |
-
2021
- 2021-08-19 CN CN202110956941.2A patent/CN113666280A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05214813A (en) * | 1992-02-05 | 1993-08-24 | Kajima Corp | Suspension jig for reinforcing cage |
| CN101245595A (en) * | 2008-03-18 | 2008-08-20 | 启东建筑集团有限公司 | Method for manufacturing big diameter borehole filling pile cage of reinforcement |
| CN103572765A (en) * | 2013-11-19 | 2014-02-12 | 成军 | Treatment and construction method of bridge site river bank expansive soil landslide positions |
| CN108677922A (en) * | 2018-06-07 | 2018-10-19 | 中铁二局第工程有限公司 | A kind of fabrication of reinforcing cage and installation method |
| WO2020244676A1 (en) * | 2019-11-27 | 2020-12-10 | 中铁九局集团有限公司 | Steel reinforcement cage for use in ventilation shaft diaphragm wall, and usage method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114453867A (en) * | 2021-12-02 | 2022-05-10 | 中国华冶科工集团有限公司 | Construction method of desorption tower |
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