CN216586226U

CN216586226U - Large-scale concrete drainage box culvert roof suspension type template support

Info

Publication number: CN216586226U
Application number: CN202120433790.8U
Authority: CN
Inventors: 曹轶; 仵慧广; 代江
Original assignee: China Gezhouba Group No 2 Engineering Co Ltd
Current assignee: China Gezhouba Group No 2 Engineering Co Ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2022-05-24
Anticipated expiration: 2031-03-01

Abstract

The utility model relates to a suspended formwork support for a roof of a large concrete drainage box culvert, which solves the problems of inconvenience, low efficiency and high cost of the existing formwork support for the construction of the roof of the concrete box culvert. The box culvert bottom plate traffic is allowed, the flow is over, and the construction is convenient. The support structure does not need to be scattered and scattered in dismantling, saves the dismantling cost, reduces the potential safety hazard of construction, and improves the construction efficiency.

Description

Large-scale concrete drainage box culvert roof suspension type template support

Technical Field

The utility model relates to a suspended template support structure for large-scale drainage box culvert concrete roof pouring construction in hydraulic and hydroelectric engineering, which is particularly suitable for large-span and large-thickness box culvert roof concrete construction.

Background

Concrete box culverts are a common drainage structure. The drainage box culvert in the hydraulic and hydroelectric engineering is mainly used for ditch water treatment, flood drainage and the like, and the structural section of the drainage box culvert is generally large in size, large in span and thick in roof plate. The common roof construction method is full scaffold support, and the common roof construction method has the disadvantages of large material consumption, long construction time and large labor investment. The scaffold is affected by the problems of multiple steel pipe connecting nodes, corrosion and the like of the scaffold, the performance of the assembled scaffold is unstable, and safety accidents are easy to happen. Sometimes, the scaffold is influenced by flood overflow in flood season, the scaffold is inevitably soaked in water, and potential safety hazards exist.

Disclosure of Invention

The utility model aims to provide a large concrete drainage box culvert top plate suspension type template support which is convenient to construct, high in efficiency, low in cost and safe.

The purpose of the utility model is realized as follows:

a suspension type formwork support for a roof of a large concrete drainage box culvert is characterized in that the water flow direction of the box culvert is vertical, the vertical water flow direction is horizontal, lower strips 1 and upper strips 6 are longitudinally and symmetrically installed on two opposite vertical walls of the box culvert respectively, the lower strips 1 are fixed on the two opposite vertical walls of the box culvert through lower-layer screws 3, lower-layer steel corrugated wires 2 and lower-layer nuts 4 respectively, the upper strips 6 are fixed on the two opposite vertical walls of the box culvert through upper-layer screws 8, upper-layer steel corrugated wires 7 and upper-layer nuts 9 respectively, the two upper strips 6 are used as supports, a plurality of main ridges 11 are transversely installed, the middle of each main ridge is connected with the upper ends of the two symmetrical inclined struts 5, the lower ends of the two inclined struts 5 are connected with the lower strips 1 respectively, a plurality of steel pipes 12 are longitudinally laid on the main ridges 11, and a combined formwork 13 is installed on the steel pipes 12.

The main edge 11 is made of I-shaped steel, the inclined strut 5 is made of channel steel, and the main edge 11 is welded with the baffle channel steel 1401 and the two side baffles 1402 at the designed position by angle welding in advance. The baffle head channel steel 1401 is perpendicular to the main corrugated I-steel 11 and is welded at the bottom of the main corrugated I-steel, then two baffle plates 1402 are welded perpendicular to the baffle head channel steel 1401 to form a clamping groove, and the upper end of the channel steel inclined strut 5 is clamped in the clamping groove.

A wood wedge 10 is arranged between the upper strip 6 and the main ridge 11.

Aiming at the defects or shortcomings of the existing concrete box culvert top plate construction formwork supporting technology, the utility model designs a box culvert top plate concrete formwork suspension type support structure. The structure can solve the problems of large using amount of conventional full framing scaffold steel pipes, many assembling and disassembling times, poor safety and the like. Meanwhile, the structure can allow box culvert bottom plate traffic, overflow and facilitate construction. The support structure does not need to be scattered and scattered in dismantling, saves the dismantling cost, reduces the potential safety hazard of construction, and improves the construction efficiency. Has the following beneficial effects:

1. the steel pipe full formwork support is simple and convenient to construct and operate, does not need to be matched with a hoisting machine, is small in material consumption compared with a common steel pipe full formwork support, saves a large amount of mounting and dismounting cost, reduces construction potential safety hazards, and greatly improves construction efficiency.

2. The main supporting rod piece is a channel steel pi-shaped diagonal brace, the load is divided into a horizontal component and a vertical component which are both supported by the poured box culvert side wall, the stress path is simple and clear, the structural elasticity and inelastic deformation factors are few, and the structure is safe and reliable.

3. The mounting height of the box culvert is small, the bottom space of the box culvert can be saved for a box culvert with a large section, and the structure can solve the problem of traffic at the bottom of the box culvert with a large length; on the other hand, the overflow is allowed under special conditions, so that the safety of the support and the flood fighting of the poured box culvert structure are not influenced.

4. The utility model adopts a pair of triangular wood wedges to realize the quick unloading of the bracket.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a schematic view of the welded connection between the main edge and the channel steel diagonal bracing.

Detailed Description

The technical solution of the present invention will be further explained and explained with reference to the drawings and the specific embodiments.

The construction method of the suspended template support structure is applied to the Mahu ditch slag treatment of the hydropower station of Hanjiang white river (clip river) and the drainage box culvert engineering of the 316 national-road lane line change engineering of the right dam abutment, and the specific engineering outline is as follows:

the ditch slag treatment and right dam abutment 316 national road diversion project flood discharge box culvert of the Hanjiang white river (clip river) hydropower station is a 5.5m × 6m three-hole one-in-one concrete box culvert, the total length is 317m, the total length is 26 sections, the longitudinal slope is 1.46 percent, and the thicknesses of the top plates of the other 25 sections except the first section of the inlet section are 1.20 m. According to the field construction conditions, the top plate concrete is supposed to adopt a combined steel formwork, but the full steel pipe scaffold is difficult to support the load of the super-thick concrete top plate, so that I-shaped steel and channel steel are adopted for supporting to form a Pi-shaped support suspension type support, and the height of the support is 2.3 m. By the construction method, the construction load requirement is met, the safe and civilized construction problem of the common full framing scaffold is solved, the engineering construction requirement is met, the lower supporting part can be provided with a channel, the transportation is facilitated, and the overall economic benefit is remarkable.

Construction process flow

Measuring and lofting → erecting a trolley → installing a lower-layer screw rod 3 → installing upper-

layer screw rods

3 and 9 → installing square timbers 1 and 6 → installing steel tile wires 2 and 7 → installing

screw caps

4 and 9 → paving an I-shaped steel main ridge 11 → installing a Pi-shaped channel steel inclined strut 5 → paving a secondary ridge steel pipe 12 → installing a template 13.

The construction steps are as follows:

(1) the flange channel steel 1401 and the two side baffles 1402 are welded at the designed positions of the main corrugated I-steel 11 by fillet welding according to the specified size.

(2) According to the scheme and the size of the frame assembly, the positions of the bottom feet of the frame are measured, the

screws

3 and 8 are placed, and the wood wedges 10 are adopted for adjustment, so that the column feet in the same array are positioned on the same horizontal plane.

(3) A lower-layer screw 3 and an upper-layer bolt 9 are pre-embedded and installed at a distance of 75cm from one end in the transverse direction and the longitudinal direction (the water flow direction of the box culvert is the longitudinal direction, and the direction perpendicular to the water flow direction is the transverse direction), a square timber 10 is installed after the position is adjusted, steel gas 7 and a nut cap are adopted for fastening 8, and the next truss is installed after one truss is installed for a certain time until the installation is finished.

(4) After the upper-layer square timber is installed, I16 multiplied by 88 multiplied by 6.3I-shaped steel 11 is transversely laid, the height is adjusted by adopting a wood wedge 10, then a channel steel pi-shaped inclined strut 5 is installed, a [10 multiplied by 48 multiplied by 5.3 channel steel is installed at the prewelding position of a lower-layer bolt 3 and the I-shaped steel, the upper end of the channel steel is clamped in a clamping groove so as to avoid dislocation during vibration, and the lower end of the channel steel is fixed on the square timber by adopting a nailing gun.

(5) And (3) paving steel pipes 12 with the longitudinal direction phi of 48 multiplied by 3.5mm on the main edge 11 at the interval of 20cm, and installing a combined template 13 after paying attention to the fact that the longitudinal square wood joints are on an upper support.

(6) In order to ensure the overall strength, rigidity and stability of the bracket, the upper and lower layers of square timber 1 and 6 are arranged along the whole length of the longitudinal axis direction of the box culvert.

Support dismantling construction process

The (loose) lower-layer screw rod 3 → the inclined strut channel steel 5 → the (loose wood wedge 10) upper-layer bolt 9 → the demolition template 13 → the secondary corrugated steel pipe 12 → the main corrugated I-steel 11 → the demolition of the upper-layer and lower-layer screw rod parts

Note that the dismantling process is carried out in sequence from one roof truss to another, and two adjacent roof trusses are not forbidden to be dismantled simultaneously.

Other requirements

The erection of the template support frame is carried out uniformly under the command of a special person according to a special construction scheme.

The erection of the formwork support frame is matched with the construction of the formwork, and the elevation of the formwork is adjusted by using the adjustable wood wedges.

The screw rod is buried accurately, and the buried inaccuracy is processed in time.

The frame body is erected and dismantled, and construction operation needs to be carried out under the cooperation of a trolley.

Claims

1. A large-scale concrete drainage box culvert top plate suspension type template bracket is characterized in that the water flow direction of the box culvert is taken as the longitudinal direction, the direction vertical to the water flow is taken as the transverse direction, the lower strips (1) and the upper strips (6) are longitudinally and respectively and symmetrically arranged on the two opposite vertical walls of the box culvert, the lower strips are respectively fixed on the two opposite vertical walls of the box culvert through lower-layer screw rods (3), lower-layer steel tile wires (2) and lower-layer nuts (4), the upper strips (6) are respectively fixed on the two opposite vertical walls of the box culvert through upper-layer screw rods (8), upper-layer steel tile wires (7) and upper-layer nuts (9), two upper strips (6) are used as supports, a plurality of main ridges (11) are transversely arranged, the middle parts of the main ridges are connected with the upper ends of two symmetrical inclined struts (5), the lower ends of the two inclined struts are respectively connected with a lower strip (1), a plurality of steel pipes (12) are longitudinally paved on the main edge, and a combined template (13) is installed on the steel pipes (12).

2. The large-scale concrete drainage box culvert roof suspended formwork support according to claim 1, wherein the main edge (11) is an I-shaped steel, the inclined strut (5) is a channel steel, the bottom of the main edge (11) is welded with the baffle head channel steel (1401), two baffle plates (1402) are welded on two sides of the baffle head channel steel (1401), the two baffle plates (1402) are perpendicular to the baffle head channel steel to form a clamping groove, and the upper end of the inclined strut (5) is clamped in the clamping groove.

3. The large-scale concrete drainage box culvert roof suspended formwork support according to claim 1, characterized in that a wooden wedge (10) is arranged between the upper strip (6) and the main ridge (11).