CN210564564U

CN210564564U - Small-space gradual-change section concrete trolley

Info

Publication number: CN210564564U
Application number: CN201921375067.8U
Authority: CN
Inventors: 张建均; 张伟; 李源; 苏海; 栾琳
Original assignee: China Gezhouba Group No 2 Engineering Co Ltd
Current assignee: China Gezhouba Group No 2 Engineering Co Ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-05-19
Anticipated expiration: 2029-08-23

Abstract

The utility model discloses little space gradual change section concrete platform truck, including the steel truss that plays main supporting role, adorn the many pin wooden trusses that bear concreting gravity and lateral pressure outside the steel truss, fix at least one deck plank sheathing on many pin wooden trusses, hug closely the baoli board on plank sheathing surface, the inside headroom size of steel truss is greater than 1.2 mx 1.0 m. The utility model discloses simple manufacture, construction convenience, simple, operating personnel can conveniently get into the inside template operation of demolising of platform truck, and is with low costs, the change of adaptable various small cross-section size gradual change sections.

Description

Small-space gradual-change section concrete trolley

Technical Field

The utility model relates to an applicable little space gradual change section concrete platform truck in little space gradual change section concrete lining construction.

Background

In the construction of hydropower stations, the structural design form of the transition section of the tunnel is usually changed from a circle to a square or from an urban door opening to a rectangle, and the change condition of the transition section is shown in fig. 3-6. The gradual change section template generally adopts the wood truss, nails the plank sheathing that two-layer thickness is 1.5cm on the wood truss, nails one deck plywood again on the plank sheathing, and gradual change section concrete lining thickness is less sometimes, and sets up the atress reinforcing bar between template and the country rock surface, and operating space is very narrow and small. If a common wood truss is used, after the wood truss is installed, an operator cannot enter the space between the wood truss and the surface of the surrounding rock to bind the steel bars, nail the template and nail the plywood.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving among the little space gradual change section lining cutting operation, ordinary wood truss supports the problem that the operation personnel can't get into and carry out ligature reinforcing bar, nail template and nail baoli board operation between wood truss and the surrounding rock surface, provides a preparation simply, and construction convenience, simple, operating personnel can conveniently get into the inside template operation of demolising of platform truck, and is with low costs, the little space gradual change section concrete platform truck of the change of adaptable various little section size gradual change sections.

The purpose of the utility model is realized like this:

the utility model discloses little space gradual change section concrete platform truck, including the steel truss that plays main supporting role, adorn the many pin wooden trusses that bear concreting gravity and lateral pressure outside the steel truss, fix at least one deck plank sheathing on many pin wooden trusses, hug closely the baoli board on plank sheathing surface, the inside headroom size of steel truss is greater than 1.2 mx 1.0m, and after concrete placement accomplished, operating personnel can conveniently get into the inside template operation of demolising of platform truck.

The distance between the two adjacent wood trusses in the longitudinal direction is 75cm, so that the combined steel formwork is convenient to support when a part of the hole section is used.

The wood template has 2 layers, each layer is 1.5cm thick, and the wood template is nailed on the wood truss layer by iron nails.

The steel truss is made of profile steel, plays a main supporting role, and has enough bearing capacity, rigidity and stability, the internal clearance size is larger than 1.2 multiplied by 1.0m, after concrete pouring is completed, an operator can conveniently enter the steel truss to disassemble a template, the steel truss can be made in sections, and the length can be properly adjusted according to the field condition. The wood trusses are made of square wood and bear the gravity and lateral pressure during concrete pouring, the distance between the two wood trusses along the longitudinal direction is generally 75cm, and the wood trusses can be conveniently supported when a combined steel template is used for a part of hole sections. If a layer of wooden template with the thickness of 3cm is used, the rigidity is high, the wooden template cannot adapt to the complex change of a gradual change section, and only a layer of wooden template with the thickness of 1.5cm is used, the bearing capacity and the rigidity are small, and the gravity and the lateral pressure of the poured concrete cannot be borne, so that the wooden template is constructed by 2 layers of wooden boards with the thickness of 1.5cm, is nailed on a wooden truss layer by iron nails, and transmits the gravity and the lateral pressure of the poured concrete to the wooden truss. The plywood mainly plays a role in repairing cracks and improving the surface smoothness and the finish degree of concrete.

The utility model discloses simple manufacture, construction convenience, simple, it is with low costs, operating personnel can conveniently get into the inside template operation of demolising of platform truck, and the change of the various small cross section size gradual changes sections of adaptation is accomplished in the back to the at utmost concrete placement. In actual construction, steel trusses, wood trusses and the like are properly adjusted according to the actual size of the transition section, and the method can be widely applied to various small-space transition section lining operations.

Drawings

Fig. 1 is the utility model discloses little space gradual change section concrete platform truck rectangle section structure chart.

Fig. 2 is the utility model discloses the circular section structure chart of little space gradual change section concrete platform truck.

Fig. 3 is a diagram of the transition progression of fig. 1.

Fig. 4 is a diagram of a transition progression 2.

Fig. 5 is a diagram of a transition progression 3.

Fig. 6 is a perspective view of the gradual transition process.

Detailed Description

Example 1:

fig. 1 shows a drawing of this embodiment 1, and the small-space gradual-change-section concrete trolley of this embodiment 1 with a rectangular cross section includes a steel truss 1 serving as a main supporting function, a plurality of wood trusses 2 directly bearing the gravity and lateral pressure of cast concrete, a two-layer wood formwork 3 fixed on the plurality of wood trusses, and a plywood 4 tightly attached to the surface of the wood formwork. The steel truss is made of profile steel, and the internal clearance size of the steel truss is larger than 1.2 multiplied by 1.0 m. The thickness of each layer of the wood template is 1.5 cm. And the distance between two adjacent wood trusses along the longitudinal direction is 75 cm.

Reference numerals

5, 6, 7, 8, 9 and 10 in fig. 1 respectively refer to a track foundation, a steel track, a transition section hole wall, concrete to be poured, a transition section bed surface and poured concrete.

Example 2:

fig. 2 shows a diagram of the present embodiment 2. This example 2 is basically the same as example 1. The difference is that the section of the small space concrete trolley in the embodiment 2 is circular.

Fig. 3 to 5 are graphs of the gradual transition process of the gradual transition section.

Fig. 6 is a perspective view of the gradual transition process.

The utility model discloses preparation, installation, application method as follows:

the method comprises the steps of processing section steel for a steel truss in a steel structure processing factory according to a design drawing, processing a wood truss in a wood processing factory according to the design drawing, transporting the wood truss to a construction site by a dump truck, placing the steel truss on a paved rail, fixing the wood truss on the steel truss, enabling the distance between the two wood trusses along the longitudinal direction to be 75cm, manually nailing a wood formwork with two thick layers on the wood truss by iron nails, planing the surface of the formwork by a plane, and nailing a plywood on the fixed wood formwork by small iron nails. And finally, lubricating oil is coated on the steel track, the whole template is pushed to a small section from a large section manually or by a winch, and the small-space gradual-change section concrete trolley is installed after measurement, lofting and positioning are carried out and then fixed.

Claims

1. The small-space gradual-change-section concrete trolley is characterized by comprising a steel truss which plays a main supporting role, a plurality of wood trusses which are arranged outside the steel truss and bear the gravity and lateral pressure of poured concrete, at least one layer of wood formwork which is fixed on the plurality of wood trusses, and a bumper plate which is tightly attached to the surface of the wood formwork, wherein the clearance size inside the steel truss is larger than 1.2m multiplied by 1.0 m.

2. The small-space gradually-graded concrete trolley according to claim 1, wherein a distance between two adjacent wood trusses in a longitudinal direction is 75 cm.

3. The small-space gradual-section concrete trolley according to claim 1 or 2, wherein the wooden formwork has 2 layers, each layer is 1.5cm thick, and the wooden truss is nailed with iron nails in a layered manner.