CN115059041A - Self-lifting assembly type formwork for gate head box structure concrete - Google Patents

Abstract

The invention relates to a construction method of a self-lifting assembly type template for gate head box structure concrete, which comprises the following steps: installing a hollow jack and establishing a working plane; installing a novel assembled support; installing an outer template and fixing the outer template with the novel assembly type support; pouring concrete; and (5) circularly constructing until capping. The invention has the beneficial effects that: a continuous construction process is provided; during construction, large hoisting machinery is not needed, and the problem of low construction efficiency of the existing template is solved; the folding and dismounting mode of the self-lifting assembly type template can adapt to various gate head multi-size empty box structures, and the construction speed of the vertical mold is increased; after the concrete is poured, various components can be quickly disassembled for later use, so that the components can be repeatedly used, a large amount of manpower and material resources are reduced, the construction cost is saved, the construction period is shortened, and the quick and efficient construction of the lock head construction of the ship lock is realized; the working plane is provided with the working platform and the safety net, so that the safety of personnel is ensured, and the protection effect is good.

Description

Self-lifting fabricated formwork for gate head empty box structural concrete

technical field

The invention belongs to the technical field of hydraulic engineering, and in particular relates to a self-lifting assembled formwork used for gate head empty box structure concrete.

Background technique

During the construction of the ship lock, multi-size empty box structures are often reserved in the main body of the water conveyance gallery and the side pier at the head of the lock. At present, the multi-size empty box structure formwork project of the gate head mostly adopts the traditional full-house scaffolding construction. However, the installation of this traditional full-house scaffolding often consumes a lot of manpower and material resources, which increases the construction cost. At the same time, the various sizes and forms of the empty box at the head of different ship locks will also make it difficult to install the formwork, which makes the formwork construction efficiency of this structure low and prolongs the construction period of the entire project.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies in the prior art, and to provide a self-lifting assembled formwork used for gate head empty box structure concrete.

This self-lifting fabricated formwork for gate head empty box structure concrete includes: hollow jack, hook, working plane, pre-embedded support rod, new type of prefabricated support, outer formwork and inner formwork; the embedded support rod is provided with In the excavated earthwork before pouring the cushion concrete, the hollow jack is set on the pre-embedded support rod, and the working plane is hoisted on the hollow jack; on the new type of prefabricated support, there is an inner formwork, the inner formwork and the new type of prefabricated type are assembled. The support forms the overall structure of the vertical mold, which is connected with the hollow jack through the hook; the new assembled support equipped with the inner template and the outer template are fixed by the tie rods;

The new assembled support is in the shape of an umbrella as a whole. The new assembled support includes: two cross bars, two push rods, multiple sliding devices, main force-bearing rods and rotating devices; the top of the main force-bearing rod of the new assembled support is provided with The rotating device is hinged on the left and right sides and a horizontal bar is hinged; each horizontal bar is fixedly connected with an inner template through hook bolts; the sliding device located at one end of each push bar is slidably connected to the middle of the horizontal bar, and each push bar is connected to the middle of the horizontal bar. The sliding device at the other end of the rod is connected to the main force-bearing rod; the connection between the sliding device and the main force-bearing rod is located in the middle and lower part of the main force-bearing rod; each cross bar is connected to the middle of the new assembled support through the push rod and the sliding device. A set angle is formed between the main load-bearing rods.

Preferably, the hollow jack includes: a reinforcing rod, a main beam, a cantilever and a hook; one end of the cantilever is horizontally fixed on the embedded support rod, and one end of the cantilever away from the embedded support rod is connected with the bottom of the main beam; the top of the main beam is connected to the The upper surface of the cantilever is connected and fixed by the reinforcing rod; the upper end of the hook is connected with the hollow jack through the cantilever, and the lower end of the hook is connected and fixed with the new type of assembly support and the outer formwork equipped with the inner formwork through the anchor; the hollow jack is also equipped with a hydraulic device .

Preferably, the hook is made of steel strand; the hollow jack is made of high-density alloy steel; the outer formwork is a steel formwork.

Preferably, the working plane includes: a working platform and a safety net; the working platform is horizontally arranged and connected to the hollow jack; and the safety net is arranged around the working platform.

Preferably, the working plane is made of iron pipes.

Preferably, the outer formwork includes: formwork A and formwork B, and formwork B is installed below formwork A.

The construction method of the self-lifting fabricated formwork for the empty box structure concrete of the gate head includes the following steps:

Step 1. Before excavating the earthwork and pouring the cushion concrete, install the embedded support rod and pour the cushion concrete; after the cushion concrete is solidified and the embedded support rod is stable, install the hollow jack on the embedded support rod and set up the work flat;

Step 2. Carry out the hoisting construction of the new prefabricated support according to the form of the lock head of the ship lock, pre-assemble the new prefabricated support with the hook bolts and the inner formwork, and fix the inner formwork on the new prefabricated support through the hook bolts to obtain The overall structure of the inner formwork and the vertical formwork supported by the new type of assembly;

Step 3. Use the step-type layered pouring method to carry out block and segment construction; lift the working plane connected with the hollow jack through the hollow jack, and connect the inner formwork with the new type of assembly-type supporting vertical formwork overall structure through the hook Connected with hollow jack;

Step 4. Under the action of the hook, install the outer formwork, and fix the connection between the outer formwork and the inner formwork: divide the outer formwork into formwork A and formwork B according to the construction progress; use a hollow jack to hoist the formwork A of the outer formwork to the new type. The prefabricated supports have the same horizontal installation height, place form B directly below form A, and use bolts to fix form A and form B; use hooks to lift the outer formwork and the inner formwork piece by piece, and lift a set of outer formwork and The inner formwork is flipped and climbed; after the outer formwork and the inner formwork are raised to the same set height at the same time, they are hoisted in place, and the outer formwork and the inner formwork in the same group are fixed by the tie rods, and the assembly is completed;

Step 5. Pour a layer of concrete and vibrate it to check the strength of the concrete at the lower part of the pier body. If the value has risen to the set strength, loosen the hook, loosen the bolts used to fix the connection form A and form B, and enter the cycle construction Stage: The hollow jack hoists the new type of assembly support hook with the inner formwork installed at the height of the next formwork as the inner formwork, and the hollow jack hoists the outer formwork to the same level of the inner formwork through the hook; After the formwork is in place, the outer formwork and the inner formwork in the same group are fixed by the tie rods; the working plane is lifted as a whole, and the next layer of concrete is poured and vibrated; as the concrete is poured, the hollow jack is continuously lifted and lifted. The outer formwork lifted by the hook continues to climb, the new prefabricated support is lifted at the same time, the concrete is poured, and the vibrator is used to vibrate until the construction reaches the top surface; all the pouring is completed, and after the concrete is finally set, sprinkle water for curing.

Preferably, the strength of the cushion concrete poured in step 1 is C15.

Preferably, in step 2, the new fabricated support is pre-processed and formed by a processing plant, and then transported to the site.

The beneficial effects of the present invention are:

(1) The present invention provides a self-lifting prefabricated formwork that can be used for multi-size empty box structural concrete of the gate head, and provides a continuous construction process; no large-scale lifting machinery is required during construction, and the problem of low construction efficiency of the existing formwork is solved. ;The folding and disassembly method of the self-lifting assembled formwork can adapt to the multi-size empty box structure of various gate heads, which speeds up the construction speed of the vertical formwork; after the concrete is poured, various components can be quickly disassembled for later use, reducing a large number of Manpower and material resources are saved, construction costs are saved, and the construction period is shortened to realize the rapid and efficient construction of the ship lock head construction.

(2) The present invention is provided with a working platform and a safety net on the working plane; the working platform is horizontally arranged and connected to the hollow jack; the safety net is arranged around the working platform; the working platform is mainly used for structural inspection and auxiliary large-area steel The formwork is lifted, including the docking and dismantling of large-area steel plates; the outer formwork is supported and climbed by means of turning the formwork, the new assembled support and the outer formwork can be quickly disassembled and assembled, and the hollow jack is self-lifting according to the construction organization. After solidification, the new fabricated support and inner formwork can be removed for reuse; the hollow jack has a corresponding intelligent control system and hydraulic system.

(3) During the construction of the ship lock, the present invention will reserve a multi-size empty box structure in the water conveyance gallery and the main body of the side pier at the head of the lock, and scientifically and reasonably carry out the vertical formwork suitable for the multi-size empty box structure; On the premise of ensuring the strength, the amount of concrete is saved, and the self-weight is reduced to ensure the stability of the foundation and avoid instability and damage; the prefabricated construction is adopted, relying on the high pier technology of concrete pouring construction, and the upper construction formwork and platform are attached through the lower formwork. The completed concrete pier body, and the cured concrete pier body is used as the support body, with the help of the construction formwork to slide in multiple directions (horizontal, vertical or slope direction) to complete the work of steel bar forming, formwork positioning correction and concrete pouring; to ensure the safety of personnel, Good protection.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the self-lifting assembled formwork of the present invention;

Fig. 2 is the partial structure front view of the self-lifting assembled formwork of the present invention;

Fig. 3 is the partial structure top view of the self-lifting assembled formwork of the present invention;

Fig. 4 is the structural schematic diagram of the novel prefabricated support of the present invention;

Fig. 5 is the schematic diagram of the self-lifting assembled structure inside the empty box of the present invention;

FIG. 6 is a structural diagram of the hollow jack of the present invention.

Description of reference numerals: 1-working plane, 2-hook, 3-hollow jack, 4-pre-embedded support rod, 5-reinforcing rod, 6-cantilever, 7-main beam, 8-template A, 9-template B , 10-New type of assembled support, 11-Outer formwork, 12-Inner formwork, 13-Cross bar, 14-Push rod, 15-Sliding device, 16-Main bearing rod, 17-Hook bolt, 18-Rotating device .

Detailed ways

The present invention will be further described below in conjunction with the embodiments. The following examples are illustrative only to aid in the understanding of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, the present invention can also be modified several times, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Example 1

The first embodiment of the present application provides a self-lifting assembled formwork for the concrete of the gate head empty box structure as shown in FIG. 1 to FIG. 6 , including: a hollow jack 3 , a hook 2 , a working plane 1 , and a pre-embedded support Rod 4, new assembled support 10, outer formwork 11 and inner formwork 12; wherein the embedded support rod 4 is set in the excavated earthwork before pouring the cushion concrete, and the hollow jack 3 is set on the embedded support rod 4, The working plane 1 is hung on the hollow jack 3; the inner formwork 12 is assembled on the new assembled support 10, and the inner formwork 12 and the new assembled support 10 form a vertical mold integral structure, and the vertical mold integral structure is connected by the hook 2 and the hollow jack. 3 is connected; the new assembled support 10 assembled with the inner formwork 12 and the outer formwork 11 are fixed by the tie rods; the working plane 1 includes: a working platform and a safety net; the working platform is set horizontally and connected to the hollow jack 3; Around the working platform, the working plane 1 is made of iron pipe; the hook 2 is made of steel strand; the hollow jack 3 is made of high-density alloy steel; the outer formwork 11 includes: formwork A8 and formwork B9, and formwork B9 is installed on formwork A8 Below; the outer formwork 11 is a steel formwork;

The new assembled support 10 is in the shape of an umbrella as a whole, and the new assembled support 10 includes: two cross bars 13, two push rods 14, a plurality of sliding devices 15, a main stress rod 16 and a rotating device 18; the new assembled support 10 The top of the main force-receiving rod 16 is provided with a rotating device 18, and the rotating device 18 is hinged on the left and right sides to hinge a crossbar 13; each crossbar 13 is fixedly connected to an inner template 12 through hook bolts 17; The sliding device 15 at one end of the rod 14 is slidably connected to the middle of the cross bar 13, and the sliding device 15 at the other end of each push rod 14 is connected to the main stress rod 16; The middle and lower part of the force bar 16; each cross bar 13 forms a set angle with the main force bar 16 located in the middle of the new assembled support 10 through the push bar 14 and the sliding device 15;

The hollow jack 3 includes: a reinforcing rod 5, a main beam 7, a cantilever 6 and a hook 2; one end of the cantilever 6 is horizontally fixed on the embedded support rod 4, and one end of the cantilever 6 away from the embedded support rod 4 and the bottom of the main beam 7 The top of the main beam 7 and the upper surface of the cantilever 6 are connected and fixed by the reinforcing rod 5; The outer formwork 11 is connected and fixed by anchors; the hollow jack 3 is also provided with a hydraulic device;

Embodiment 2

On the basis of the first embodiment, the second embodiment of the present application provides the construction method of the self-lifting prefabricated formwork for the gate head empty box structure concrete in the first embodiment:

Step 1. Before excavating the earthwork and pouring the cushion concrete, install the embedded support rod 4 and pour the cushion concrete; after the cushion concrete is solidified and the embedded support rod 4 is stable, install a hollow jack on the embedded support rod 4 3 and establish working plane 1; the strength of the cushion concrete is C15;

Step 2. Carry out the hoisting construction of the new prefabricated support 10 according to the form of the lock head of the ship lock, pre-assemble the new prefabricated support 10 with the hook bolts 17 and the inner formwork 12, and fix the inner formwork 12 on the new type by the hook bolts 17. On the assembled support 10, the overall structure of the vertical mold of the inner template 12 and the new assembled support 10 is obtained;

Step 3. Use the step-type layered pouring method to carry out block and segment construction; lift the working plane 1 connected to the hollow jack 3 through the hollow jack 3, and connect the inner formwork 12 with the new assembly type support through the hook 2 The overall structure of the vertical mold 10 is connected with the hollow jack 3;

Step 4. Under the action of the hook 2, the outer formwork 11 is installed, and the outer formwork 11 and the inner formwork 12 are fixedly connected: the outer formwork 11 is divided into formwork A8 and formwork B9 according to the construction progress; The formwork A8 is hoisted to the same horizontal installation height as the new prefabricated support 10, and the formwork B9 is placed directly below the formwork A8, and the formwork A8 and the formwork B9 are fixed with bolts; Use the hook 2 to lift the outer formwork 11 and the inner formwork 12 piece by piece , lift a group of outer formwork 11 and inner formwork 12 for each cycle to climb; after the outer formwork 11 and the inner formwork 12 are raised to the same set height at the same time, they are hoisted in place, and the outer formwork 11 and the inner formwork in the same group are lifted. The template 12 is fixed by the tie rod, and the assembly is completed;

Step 5. Pour a layer of concrete and vibrate to check the strength of the concrete at the lower part of the pier body. If the value has risen to the set strength, loosen the hook 2, loosen the bolts used to fix the connection form A8 and the form B9, and enter the cycle Construction stage: The hollow jack 3 lifts the new type of assembled support 10 with the inner formwork 12 installed at the height of the next formwork with the hook 2 as the inner formwork. Horizontal plane; after the outer formwork 11 and the inner formwork 12 of the next layer are in place, the outer formwork 11 and the inner formwork 12 in the same group are fixed by the tie rods; the working plane 1 is lifted as a whole, and the concrete of the next layer is poured and vibrated; As the concrete is poured, the hollow jack 3 is continuously raised, the outer formwork 11 lifted by the hook 2 continues to climb, the new prefabricated support 10 is lifted at the same time, the concrete is poured, and the vibrator is used to vibrate until the construction reaches the top surface; All the pouring is completed, and after the concrete is finally set, water is sprayed for curing; the new prefabricated support 10 is pre-processed and formed by the processing plant, and then transported to the site.

Claims (9)

1. A self-lifting assembled formwork for gate head empty box structure concrete, characterized in that, comprising: a hollow jack (3), a hook (2), a working plane (1), a pre-embedded support rod (4) , a new type of prefabricated support (10), an outer formwork (11) and an inner formwork (12); the pre-embedded support rods (4) are arranged in the excavated earthwork before the cushion concrete is poured, and the hollow jacks (3) are arranged On the pre-embedded support rod (4), the working plane (1) is suspended on the hollow jack (3); an inner formwork (12) is assembled on the new assembled support (10), and the inner formwork (12) is connected with the new assembly The modular support (10) forms the overall structure of the vertical mold, and the overall structure of the vertical mold is connected with the hollow jack 3 through the hook (2); Pull rod fixed; The new assembled support (10) is in the shape of an umbrella as a whole, and the new assembled support (10) includes: two transverse rods (13), two push rods (14), a plurality of sliding devices (15), and a main stress rod ( 16) and a rotating device (18); a rotating device (18) is provided at the top of the main force-receiving rod (16) of the new assembled support (10), and the rotating device (18) is hinged to the left and right sides with a cross bar (13) ); each cross bar (13) is fixedly connected with an inner template (12) through hook head bolts (17); a sliding device (15) located at one end of each push rod (14) is slidably connected to the middle of the cross bar (13) , the sliding device (15) at the other end of each push rod (14) is connected to the main bearing rod (16); the connection between the sliding device (15) and the main bearing rod (16) is located on the main bearing rod (16) ); each transverse rod (13) forms a set angle with the main force-bearing rod (16) located in the middle of the new assembled support (10) through the push rod (14) and the sliding device (15). 2. The self-lifting assembled formwork for gate head empty box structure concrete according to claim 1, wherein the hollow jack (3) comprises: a reinforcing rod (5), a main beam (7), a cantilever (6) ) and hook (2); one end of the cantilever (6) is horizontally fixed on the embedded support rod (4), and one end of the cantilever (6) away from the embedded support rod (4) is connected to the bottom of the main beam (7) ; The top of the main beam (7) and the upper surface of the cantilever (6) are connected and fixed by the reinforcing rod (5); the upper end of the hook (2) is connected with the hollow jack (3) through the cantilever (6), and the lower end of the hook (2) is connected with The novel assembled support (10) assembled with the inner template (12) and the outer template (11) are connected and fixed by anchors; the hollow jack (3) is also provided with a hydraulic device. 3. The self-lifting assembled formwork for gate head empty box structure concrete according to claim 2, characterized in that: the hook (2) is made of steel strand; the hollow jack (3) is a high-density alloy steel Material; the outer formwork (11) is a steel formwork. 4. A self-lifting assembled formwork for gate head empty box structure concrete according to claim 1, characterized in that the working plane (1) comprises: a work platform and a safety net; the work platform is horizontally arranged and connected to On the hollow jack (3); the safety net is arranged around the working platform. 5 . The self-lifting assembled formwork for gate head empty box structure concrete according to claim 4 , wherein the working plane ( 1 ) is made of iron pipes. 6 . 6. A kind of self-lifting assembled formwork for gate head empty box structure concrete according to claim 1, it is characterized in that, outer formwork (11) comprises: formwork A (8) and formwork B (9), formwork B(9) is installed below template A(8). 7. A construction method for the self-lifting prefabricated formwork for gate head empty box structure concrete, is characterized in that, comprises the following steps: Step 1. Excavate earthwork, install pre-embedded support rods (4) before pouring the cushion concrete, and pour the cushion concrete; after the cushion concrete is solidified and the embedded support rods (4) are stabilized, install the embedded support rods (4). 4) Install the hollow jack (3) and establish the working plane (1); Step 2. Carry out the hoisting construction of the new prefabricated support (10) according to the form of the lock head of the ship lock, and pre-assemble the new prefabricated support 10 with the hook bolts 17 and the inner formwork (12). The inner formwork (12) is fixed on the new assembled support (10) to obtain the vertical form integral structure of the inner formwork (12) and the new assembled support (10); Step 3. Use the step-type layered pouring method to carry out block and segment construction on the lock head of the ship lock; lift the working plane (1) connected to the hollow jack (3) through the hollow jack (3), The overall structure of the vertical formwork of the inner formwork (12) and the new assembled support (10) is connected with the hollow jack 3; Step 4. Under the action of the hook 2, the outer formwork (11) is installed, and the outer formwork (11) and the inner formwork (12) are fixedly connected: the outer formwork (11) is divided into the formwork A (8) and the inner formwork according to the construction progress. Form B (9); use the hollow jack (3) to hoist the form A (8) of the outer form (11) to the same horizontal installation height as the new prefabricated support (10), and place the form B (9) on the form A (8) Right below, use bolts to fix formwork A (8) and formwork B (9); use the hook (2) to lift the outer formwork (11) and the inner formwork (12) piece by piece, and lift a set of outer formwork each cycle The formwork (11) and the inner formwork (12) are flipped and climbed; after the outer formwork (11) and the inner formwork (12) are raised to the same set height at the same time, they are hoisted in place, and the outer formwork (11) and the The inner template (12) is fixed by the tie rod, and the assembly is completed; Step 5. Pour a layer of concrete and vibrate it to check the strength of the concrete at the lower part of the pier body. If the value has risen to the set strength, loosen the hook (2) and loosen the connecting formwork A (8) and formwork B used for fixing The bolt of (9) enters the cycle construction stage: the hollow jack (3) lifts the new assembled support (10) with the inner formwork (12) installed at the height of the next die with the hook (2) as the inner form, and the hollow jack (3) Hoist the outer formwork (11) to the same level of the inner formwork (12) through the hook (2); after the outer formwork (11) and the inner formwork (12) of the next layer are in place, remove the outer formwork in the same group (11) and the inner formwork (12) are fixed by the tie rods; the working plane (1) is lifted as a whole, and the next layer of concrete is poured and vibrated; as the concrete is poured, the hollow jack (3) is continuously lifted and is The outer formwork (11) lifted by the hook (2) continues to climb, the new prefabricated support (10) is lifted at the same time, the concrete is poured, and the vibrator is used to vibrate until the construction reaches the top surface; all pouring is completed, and the concrete is finally set. Afterwards, sprinkle water for maintenance. 8 . The construction method of the self-lifting prefabricated formwork for gate head empty box structure concrete according to claim 7 , wherein the strength of the cushion concrete poured in step 1 is C15. 9 . 9. The construction method of the self-lifting prefabricated formwork used for gate head empty box structure concrete according to claim 7, it is characterized in that: in step 2, the novel prefabricated support (10) is processed and formed in advance by a processing plant, and then transported to on site.

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