CN220620114U - Trackless sliding mode structure - Google Patents

Abstract

The utility model relates to a trackless sliding mode structure which comprises a sliding mode body main supporting beam frame, an operation platform truss, a scaffold board, a traction end, a sunshade beam frame, a sliding mode panel, a steel wire rope, a first base layer and a second base layer, wherein the first base layer is positioned at the top end of the second base layer, the first base layer and the second base layer are placed at inclined included angles with the horizontal plane, and the top end of the first base layer is fixedly connected with the sliding mode body main supporting beam frame. The utility model adopts a three-section split structure, each traction unit is independent, is provided with a main rope and an auxiliary rope, is independently connected with a panel reinforcing steel mesh, greatly increases the construction safety coefficient, adopts a synchronous starting switch, avoids the conditions of derailment, wire rope breakage, sliding mode group deviation and the like caused by the fact that winches on two sides are not synchronously operated or started due to the influence of human factors during traction, improves the construction speed, ensures the construction quality and ensures the construction safety.

Description

Trackless sliding mode structure

Technical Field

The utility model relates to the technical field of panel concrete pouring construction, in particular to a trackless sliding mode structure.

Background

Along with the vigorous development of domestic hydraulic engineering construction projects, various innovative and improved process methods are continuously emerging like spring bamboo shoots after raining, so that the smooth operation of construction and production is promoted, the efficacy is ensured, the construction cost is saved, and the production efficiency is improved.

The traditional panel concrete pouring process adopts a rail sliding mode for construction, and has great constraint on the panel concrete pouring process and after forming due to the arrangement of a traveling system, and the process is relatively complex and has lower efficacy. The trackless sliding mode is gradually popularized and applied in recent years, and is designed as follows: the two-section integrated structural design of the main slip form and the secondary plastering platform has the following problems in panel concrete pouring construction:

1. after the secondary plastering of the concrete surface of the panel is finished, the sliding module starts to lift, the lifting interval time is 10-12 min, the concrete is not initially set in the period, the surface is softer and can not be covered and maintained in time, and the concrete is directly exposed in the natural environment, so that the quality hidden trouble is generated;

2. the panel concrete curing water pipe is generally hung on a secondary plastering platform, rises along with the lifting of the sliding module, and then opens a valve to spray and spray water for curing the concrete, so that the lower concrete is not initially set, and the surface of the concrete is extremely easy to damage. And water is sprayed after the initial setting of the concrete, because the initial setting time of the concrete is generally about 3 hours, and calculated according to the lifting speed of the slip form group of 1.8m/h, the 5.4m concrete surface is exposed to the natural environment, and is easy to induce to generate temperature cracks, thereby influencing the overall quality of the panel concrete, and the cracks are multipolar to greatly increase the post-treatment difficulty and cost;

3. after 3 hours, carrying out covering heat preservation and moisture preservation maintenance, wherein common covering materials are as follows: geotechnical cloth, plastic film, straw mat, plastic film, geomembrane, etc. all need be laid, pulled by the manual work in these maintenance measures, because concrete just set can not stand the people, so this, the condition emergence that the maintenance is untimely, not in place has all appeared in most of this kind of engineering to influence panel overall construction quality.

In summary, the subject relies on the face rockfill dam engineering of the Han's gorge to carry out scientific research, combines the problems, optimally designs the sliding module, and improves the sliding module as follows: the split structural design of the main slip form body, the secondary plastering platform and the tertiary repairing and maintaining platform develops the application technical research of the trackless slip form in the thin-wall concrete construction so as to realize technical innovation and technological innovation, find out the technical measures for solving the problems, improve the engineering quality, reduce the construction cost and have more profound influence and significance on the similar panel concrete engineering construction.

Disclosure of Invention

The utility model provides a trackless sliding mode structure for solving the problems in the prior art.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model provides a railless slipform structure, includes slipform body main support beam frame, operation platform truss, scaffold board, traction end, sunshade roof beam frame, slipform panel, wire rope, first basic unit and second basic unit, first basic unit is located the top of second basic unit, first basic unit and second basic unit all are personally submitted the inclined contained angle with the level and are placed, the top fixedly connected with slipform body main support beam frame of first basic unit, the quantity of slipform body main support beam frame sets up to a plurality ofly, the top welding of slipform body main support beam frame has the slipform panel, the top fixedly connected with operation platform truss of first basic unit, the quantity of operation platform truss sets up to a plurality ofly, the scaffold board has been laid on operation platform truss's top, the quantity of scaffold board sets up to a plurality ofly, the one end fixedly connected with traction end of slipform body main support beam frame, the quantity of traction end sets up to a plurality ofly, the bottom fixedly connected with wire rope of traction end, the quantity of slipform body main support beam frame sets up to a plurality of canopy, the top fixedly connected with steel wire rope, the top of operation platform truss is connected with a plurality of round base shafts, one side is connected with round, the top fixedly connected with round girder.

Preferably, the main support beam frame of the sliding mode body is made of I-steel, and the top end of the truss of the operation platform is paved by adopting a template.

Preferably, the sunshade shed beam frame is made of angle steel, the round connecting shaft is made of round steel, and the sliding mode panel is made of steel plates.

Preferably, the traction end is wrapped by round steel, and the traction end is made of steel plates.

Preferably, the top end of the operation platform truss is used for paving scaffold boards, and a plurality of scaffold boards are equidistantly paved at the top end of the operation platform truss.

The beneficial effects of the utility model are as follows:

1. according to the utility model, a three-section split type structure is adopted, each traction unit is independent, and is provided with a main rope and an auxiliary rope, which are independently connected with a panel reinforcing steel mesh, so that the construction safety coefficient is greatly increased, and the traction system adopts a synchronous starting switch, so that the conditions of derailment, wire rope breakage, sliding mode group deviation and the like caused by the fact that synchronous operation or starting of winches on two sides is not realized due to the influence of human factors during traction are avoided, the construction speed is improved, the construction quality is ensured, and the construction safety is ensured;

2. according to the concrete initial setting time (2 h46 min) and the sliding module lifting speed (1.8 m/h) which are set forth in the concrete mix proportion design, the third section of ' three-time trimming maintenance platform ' is 4.98m away from the main sliding die body ' through calculation, the requirement of the concrete initial setting time is just met, the concrete can be timely subjected to covering, heat preservation and moisture maintenance, a reliable supporting piece is provided, a sunshade is set between the main sliding die body and the three-time trimming maintenance platform, the cast concrete is prevented from being sun-cured and rain-cured before covering and curing, the used maintenance material (a geomembrane) is placed on the platform when the sliding module is hoisted, the concrete can be timely subjected to covering maintenance, the damage to the concrete surface during manual laying is effectively avoided, the potential safety hazards such as falling of personnel and material rolling during manual laying are eliminated, meanwhile, the quality defect of the concrete surface is checked again before the maintenance material is laid, the concrete surface can be timely treated, and the appearance quality of the panel concrete is ensured.

Drawings

FIG. 1 is a structural design of a three-section split slip-form module of the present utility model.

In fig. 1:1. a slip form body main support beam frame; 2. operating a platform truss; 3. a scaffold plate; 4. a traction end; 5. a sunshade beam frame; 6. a circular connecting shaft; 7. a slip form panel; 8. a wire rope; 9. a first base layer; 10. and a second base layer.

Detailed Description

The trackless sliding formwork structure shown in fig. 1 comprises a sliding formwork body main supporting beam frame 1, an operation platform truss 2, a scaffold board 3, a traction end 4, a sunshade girder frame 5, a sliding formwork panel 7, a steel wire rope 8, a first base layer 9 and a second base layer 10, wherein the first base layer 9 is positioned at the top end of the second base layer 10, the first base layer 9 and the second base layer 10 are placed at inclined angles with the horizontal plane, the top end of the first base layer 9 is fixedly connected with the sliding formwork body main supporting beam frame 1, the number of the sliding formwork body main supporting beam frame 1 is multiple, the sliding formwork body main supporting beam frame 1 is welded by the sliding formwork panel 7, the traction end 4 is a main stress body, the top end of the sliding formwork body main supporting beam frame 1 is welded with the sliding formwork panel 7, the top end of the first base layer 9 is fixedly connected with the operation platform truss 2, the number of the operation platform truss 2 is multiple, the operation platform truss 2 is used for laying the scaffold board 3, the operation personnel can walk and the small-sized tools, the top end of the operation platform 2 is laid with the scaffold board 3, the number of the scaffold board 3 is fixedly connected with the steel wire rope 4, the traction end is connected with the top end of the sunshade girder frame 4, the number of the sunshade girder frame is connected with the steel wire rope 4, the round traction end 4 is connected with the top end 4, the round traction end 4 is fixedly connected with the steel wire rope 4, the top end 4 is connected with the top end of the protection bridge 6, the round top end 4 is fixedly, the top end of the protection bridge 4 is connected with the steel wire rope 6, the top end of the protection frame is connected with the top end 6, and is connected with the round top end 6, and is connected with the top protection frame 6, the circular connecting shaft 6 is improved to be made of round steel, sliding friction resistance is reduced by reducing contact area with a side die, sliding lifting is facilitated, the sliding die body main support beam frame 1 is made of I-steel, the top end of the operation platform truss 2 is paved by adopting a die plate, the sunshade beam frame 5 is made of angle steel, the circular connecting shaft 6 is made of round steel, the sliding die panel 7 is made of steel plate, the traction end 4 is wrapped by round steel, the traction end 4 is made of steel plate, the top end of the operation platform truss 2 is used for paving the scaffold plates 3, and the scaffold plates 3 are equidistantly paved on the top end of the operation platform truss 2.

The utility model relates to an innovative trackless sliding mode structure optimization design research and checking calculation

The utility model has the following research ideas:

by applying technical research on the trackless slip form in thin-wall concrete construction, the structural design of the slip form assembly is improved, and the problem of mutual limitation of concrete in the pouring process and the curing process is solved. Meanwhile, the cracking of the panel after molding can be greatly reduced and avoided. According to initial setting time data of a concrete mixing ratio test, the traction distance of a slip form body, a secondary plastering platform and a tertiary finishing maintenance platform is strictly controlled through accurate calculation, and the concrete pouring quality problem caused by untimely concrete maintenance is solved under the condition that normal concrete pouring and slip form lifting speed are guaranteed. The three-section split structure design ensures the construction progress, quality and safety.

The structural body load calculation of the utility model:

first point: load calculation

Working conditions

The concrete design index of the face plate rockfill dam of the engineering is C30W8F250, the anti-seepage face plate concrete is common concrete, equal-thickness concrete plates are arranged from top to bottom, the thickness of the face plate is 40cm, 16 face plates are total, the face plate slope ratio is 1:1.4, the width of a face plate standard block is 13m, the two sides are 6.5m, the single-layer bidirectional reinforcement is distributed, the face plate area is 8232.13m2, and the face plate concrete is 3292.85m3.

Second point: the calculation basis is as follows:

blue figure of face rockfill dam construction

Sliding template engineering technical Standard GB/T50113-2019

Technical Specification for concrete faced rockfill dam construction SL 49-2015

Building construction calculation Manual (fourth edition)

Mandatory section of engineering construction Standard treaty Water conservancy project (2020 edition)

"Hydraulic concrete construction Specification" SL677-2014

Third point: load calculation:

reference formula:

formula one: (G1+G2) Cosα.gtoreq.Pp

Wherein:

g1 and G2 are dead weight and counterweight of the slip form, and the units are as follows: KN;

an included angle between the a-slip form panel and the horizontal plane;

and P-floating force of newly poured concrete to sliding mode on slope surface, wherein the unit is: KN;

p is calculated by the formula:

formula II: p=pn×l×b×sin α

Wherein:

pn-concrete side pressure of the inward-tilting template, unit KPa;

l-width of concrete block poured, unit: m;

b-width of sliding template, unit: m;

formula III: pn=0.22 γct0β1β2v1/2

Looking up "manual for construction calculation" (fourth edition), chapter 9.1, pn takes 5KPa when the elevation angle of casting gradient is less than 450.

And (5) calculating the lifting force (buoyancy) of the concrete, and calculating the new casting layer by referring to fluid mechanics. The casting thickness of each layer is calculated according to 0.3m, and meanwhile, the load generated by concrete vibration is considered to be 4kN/m < 2 >.

Resolving value table

Project	P(KN)	Pn(KPa)	a(0)	L(m)	b(m)
						Numerical value	45.34	5	35.53767778	13	1.2

The weight G2 is more than or equal to 27.5KN, namely at least 2.75t of weight is needed, and the total weight is 3.5t in order to leave a certain margin and ensure the sliding mode balance. The counterweight was made of precast concrete cubes having dimensions of 0.4 (thick) ×0.8 (long) ×0.5 (wide) =0.16m3, and a total of 10 pieces of weight of 0.384 t.

The traction force checking calculation of the utility model:

first point: winch tension calculation

The magnitude of the traction force of the sliding mode in the traction system is related to the dead weight of the sliding mode and the binding force of the sliding mode and the newly poured concrete, and is expressed as follows

Reference formula:

formula one: t= [ τA+G×sina+|Gcosa-P|f ] K

Wherein:

t-slip form traction, unit: KN;

the adhesive force between the tau-slide mold body and the concrete is 0.5KN/m2;

a-slip die body and concrete contact area, unit: m2;

a-the included angle between the slope surface and the horizontal plane;

g-slip form dead weight plus weight, unit: KN;

floating force of P-concrete, unit: KN;

f, the friction coefficient between the steel die body and the concrete is 0.4 to 0.5;

k-traction safety coefficient, 1.5-2.0.

According to the actual production conditions, the values and calculation in the above formula are shown in table 1 by referring to the related data.

Solution value table 1

Second point: hoist counterweight calculation

Formula II: mu G is greater than or equal to KT

Wherein:

g-weight block weight

Mu-static friction coefficient of 0.65

The maximum tension of the T-winch is 30.38KN;

k-safety factor, 2.5

Referring to the related data, the values and calculations in the above formula are shown in Table 2.

Solution value table 2

Project	G(KN)	μ	T(KN)	K
					Numerical value	116.9	0.65	30.38	2.5

According to the calculation result and the configuration movable pulleys, 2 winches with the length of 5t are selected as traction equipment for slip form construction. Tension T/4=30.38 KN applied to each hoist. Thus each hoist counterweight is 11.7t.

Each winch is provided with 2 counterweights, the counterweight is made of precast concrete filled cubes, and the single block has the following dimensions: 1.0 (height) ×2.0 (length) ×1.5 (width) =3.3m3, monolithic weight 7.92t, total 4 blocks.

Through the calculation, the traction force Sigma T is larger than the total load Sigma P of the sliding mode, and the sliding mode system operates stably and safely.

The main conclusion of the utility model is that:

the research result of the utility model is successfully applied to the concrete pouring construction of the face plate rock-fill dam of the engineering face plate of the Han's gorge reservoir of Jin Changshi, effectively solves the technical problems encountered by the curing of the concrete in the pouring process and after the pouring, ensures the overall quality of the face plate concrete after the molding, inhibits the cause of cracking of the face plate concrete, adopts construction measures, developed new appliances and new technology, obtains good application effect, and has declared a high and new subject research (the technical research of the face plate concrete with high cracking resistance) and a technological advancement prize at present, achieves the purpose of the subject research, and mainly forms the following application technologies:

firstly, through the three split type structural design of innovation improvement "trackless sliding mode", realized high-efficient quick concrete placement, and the timely effectual concrete curing that carries on, the quality assurance has accomplished engineering construction task.

Secondly, through accurate calculation, each traction unit is reasonable in layout, and when the concrete just reaches the initial setting period, covering water sprinkling maintenance is immediately carried out, so that the inducement of concrete crack generation is effectively restrained, and the conflict and restriction between concrete pouring and maintenance procedures are solved. The problem of the concrete quality hidden danger after pouring because of temperature condition changes, natural environment influences is solved.

Through slip form improvement and technology innovation technology, quick pouring maintenance is realized, and the technical contradiction of mutual restriction seen in panel concrete pouring and maintenance procedures is solved. The concrete entity and the appearance quality of the formed panel are guaranteed, and the construction progress is accelerated (20 days earlier than the planned construction period is finished); the post quality defect treatment period is effectively saved, the panel concrete quality defect treatment cost is reduced, and the overall quality of the engineering is further improved. Provides reference for construction of similar engineering in future, and provides reference for construction theory research on panel concrete cracking prevention and crack making key technology.

Table 5-1 novel trackless sliding mode research results

The utility model has the economic and social benefits that:

first point: economic benefit

After the technical contradiction that the dam panel concrete pouring technology and the maintenance technology are mutually restricted is solved, the inducement of the panel concrete cracks is fundamentally restrained, and the appearance and the entity quality of the concrete panel are improved (the two types of cracks of the formed panel concrete are only 17, and the three types of cracks are not present). The construction period of panel concrete pouring is also finished 20 days earlier than the original design planning (the original design planning panel concrete construction period is 60 days, and is actually finished only by 40 days).

First, save construction period cost

The construction period is 20 days in advance, 98 persons of various concrete construction workers are put into the engineering, 1 crane, 1 excavator, 4 filling truck and 2 loader are mainly rented, and the construction period cost is saved by 99.07 ten thousand yuan.

Average monthly wages per person are calculated in 12000 yuan, saving labor cost=98× (12000 ++3×2) =78.4 ten thousand yuan;

device cost= (55000 ≡3×2+71000 ≡3×2+31000 ≡3×2×4+30000 ≡3×2×2) = 20.67 yuan;

second, save the cost of post quality defect treatment

Through general investigation, the class I cracks of the engineering account for 96.3 percent (2729.14 m), the class II cracks account for 3.7 percent (104.86 m), and the class III cracks are absent. And (3) according to a standard fracture classification treatment mode, performing surface sealing treatment on the class I fracture, and performing chemical grouting treatment on the class II and class III fracture. Chemical grouting is generally 275 yuan/m.

Processing cost saving=275 yuan/m× (2729.14/2) =37.53 ten thousand yuan.

Third, save the total cost

The total construction cost is saved, namely the research and development cost of the subject is 99.07 ten thousand yuan +37.53 ten thousand yuan-27.63 ten thousand yuan = 108.97 ten thousand yuan.

Second point: social benefits

The design and application of the three-section split trackless sliding mode are realized, the technical innovation and the technological innovation are realized, the engineering construction quality, the safety and the progress are improved, meanwhile, the full success is achieved, the detected concrete cracks of the panel are the I-type cracks, the expected effect and the target (only 17 second-type cracks account for 7.3 percent and account for 0.0005 percent of the panel area) are achieved, the quality assessment of the subsection engineering is good), the innovation and breakthrough are realized on the key technology of quick pouring and timely maintenance under the ultra-thin panel concrete design condition, and in the summary, the utility model has the following beneficial effects: according to the concrete initial setting time (2 h46 min) and the sliding module lifting speed (1.8 m/h) which are set forth in the concrete mixing proportion design, the third section of ' three-time trimming maintenance platform ' is 4.98m away from the main sliding die body ' through calculation, the requirement of the concrete initial setting time is just met, the concrete can be timely subjected to covering, heat preservation and moisture maintenance, a reliable supporting piece is provided, a sunshade is built between the ' main sliding die body and the three-time trimming maintenance platform ', and the cast concrete is prevented from being sun-cured and rain-cured before covering and maintenance. When the slip form group is hoisted, the used maintenance material (geomembrane) is placed on the platform, so that the concrete can be timely covered and maintained, the damage to the surface of the concrete caused by manual paving is effectively avoided, potential safety hazards such as falling of personnel and rolling of the material existing during manual paving are eliminated, meanwhile, before the maintenance material is paved, whether the quality defect exists on the surface of the concrete is checked again, the concrete can be timely treated, and the appearance quality of the panel concrete is ensured.

Claims (5)

1. The utility model provides a trackless slipform structure, includes slipform body main support roof beam structure (1), operation platform truss (2), scaffold board (3), traction end (4), sunshade roof beam structure (5), slipform panel (7), wire rope (8), first basic unit (9) and second basic unit (10), its characterized in that: the utility model provides a sunshade, including base station, sunshade, base station, pedal, slip form body main support roof beam frame, first basic unit (9) are located the top of second basic unit (10), first basic unit (9) all are placed with the level inclined angle, the top fixedly connected with slip form body main support roof beam frame (1) of first basic unit (9), the quantity of slip form body main support roof beam frame (1) sets up to a plurality ofly, the top welding of slip form body main support roof beam frame (1) has slip form panel (7), the top fixedly connected with operation platform truss (2) of first basic unit (9), the quantity of operation platform truss (2) sets up to a plurality of, scaffold (3) have been laid on the top of operation platform truss (2), scaffold (3) quantity sets up to a plurality of, the one end fixedly connected with of slip form body main support roof beam frame (1) pulls end (4), the quantity of pulling end (4) sets up to a plurality of steel wire rope (8), the quantity of steel wire rope (8) sets up to a plurality of steel wire rope (6) links circular truss (6), one side of base station (6) is connected with circular truss (6).

2. A trackless sliding mode structure according to claim 1, wherein: the sliding formwork main support beam frame (1) is made of I-steel, and the top end of the operation platform truss (2) is paved by adopting a formwork.

3. A trackless sliding mode structure according to claim 2, wherein: the sunshade beam frame (5) is made of angle steel, the circular connecting shaft (6) is made of round steel, and the sliding mode panel (7) is made of steel plates.

4. A trackless sliding mode structure according to claim 3, wherein: the traction end (4) is wrapped by round steel, and the traction end (4) is made of steel plates.

5. The trackless sliding mode structure according to claim 4, wherein: the top of operation platform truss (2) is used for laying scaffold board (3), a plurality of scaffold board (3) equidistance are laid on the top of operation platform truss (2).