KR960016754B1 - Caisson working method and caisson form structure - Google Patents

Abstract

The structure is designed to construct a caisson foundation in caisson form continuously. The structure includes : a cassion outer wall body (102) and a cassion connecting wall body (103) located between an outer wall mould (1a) and an inner wall mould (1b); reinforced concrete cast holes (2a, 2b); a hydraulic jack (4); a bracket (6); a railing (8); a safety net (9); a work footing (11); and a maintenance work footing (18).

Description

Caisson form and caisson continuous construction method

1 is a plan view of the caisson foam of the present invention.

2 is a front view of the caisson form of the present invention.

Figure 3 and Figure 4 is a partial cross-sectional view showing a sliding operation state of the caisson form to build the caisson with the present invention, Figure 3 shows a state in which concrete is poured in the concrete casting portion of the caisson form.

4 shows an operating state of sliding the caisson form upward.

Figure 5 is a construction example for explaining a method of continuously building a caisson using the caisson form of the present invention.

6 is a perspective view showing a configuration example of a caisson.

* Explanation of symbols for main parts of the drawings

1: caisson form 2a, 2b: iron casting concrete

3: connection frame 4: hydraulic jack

5a, 5b: Plate 6: Bracket

7, 11: scaffolding 8: railing

9: safety net 10: stable net installation stand

15: extension frame 16: moving frame

17: round bar 18: repair work scaffold

The present invention relates to a caisson form used to build a caisson used for the construction of water offshore and a method for continuously constructing a caisson with a caisson form divided into a plurality of caissons using the same.

In general, the caisson used for the construction of water curtains such as coasts has a size of about 7.4, about 13, and about 19.5 in height, as shown in FIG. 6, and the weight is about 1,200 tons and is constructed of reinforced concrete. do.

Since the caisson as described above is very large, it has been using a general construction method to build the formwork by a certain height upward.

However, caisson itself does not build all of its cross-section with reinforced concrete, but forms several holes.

Therefore, the form (FORM) used in the conventional general construction method is installed in a divided structure that is installed on the outer wall, that is, the inner wall, that is to be installed on all four inner walls of each hole, so when building the caisson using the general construction method on the outer wall In addition to the lifting mechanism that raises the form, it was necessary to mobilize a separate accessory device in addition to the formwork installed on the inner wall and the form installed on the inner wall. Since the assembly and disassembly work was very difficult and the risks were accompanied, it is necessary to respond sensitively to safety accidents. To this end, the mobilization of the device to safely raise the formwork and the various accessories for assembly and disassembly and safety will increase the number of workers. Need equipment and labor There was a problem that caused the weighting of the rain, and also the sliding method as a far more effective method than the general method of removing and attaching the formwork, but this method is effective in raising the formwork at the height of the caissons, but the caisson After completion of construction, it must be dismantled and moved. Unlike the general formwork, the formwork is complicated in structure and composed of heavy weight, which requires a great deal of equipment and a large number of people when dismantling at high places. In addition, there is a problem that it takes a long time at the same time, and this problem also appears during assembly, which increases the cost of caisson construction and delays the air, so it is not applicable to the construction of caisson and it is impossible to move the formwork to the body. Sliding ball Was virtually impossible to apply the continuous deployment of the caisson.

The present invention solves the determination of the conventional general method and the sliding method to solve the ascending operation of the form at a time, and if you want to build a large number of caissons at the same time to contribute to the construction air shortening of the caisson The construction team is determined by dividing the number into one or two or more, and then the caissons can be sequentially constructed in the group unit in order to build the caisson using the divided construction groups as a group unit. By shortening its own construction air and simultaneously constructing many caissons, it is possible to further shorten the construction air of caissons required for water barrier construction, and also build caissons with less equipment and fewer people than conventional sliding methods. Aims to provide a caisson form and a caisson construction method According to the accompanying drawings, the caisson and the continuous construction method of the present invention will be described below.

1 and 2 are a plan view and a front view showing the configuration of the caisson foam of the present invention, the caisson foam (1) is formed in the outer wall formwork 1A and caisson 100 to form the outer wall of the caisson 100 The inner wall formwork 1B for constructing the hole 101 to be formed, the plurality of inner wall formwork 1B is composed of a small square shape having a size that can be installed in the rectangular outer wall formwork 1A. In addition, the plurality of inner wall dies 1B are formed with reinforced concrete placing holes (2a, 2b) that can build a connecting wall 103 for connecting the outer wall 102 and the outer wall of the caisson 100 .

The outer wall formwork 1A and the plurality of inner wall formwork 1B are connected by a plurality of connecting skeletons 3 so as to form reinforced concrete placing balls 2a and 2b, and a plurality of connecting frames ( 3) Each of them is selected and arranged in a position that can give the caisson foam itself an equal lifting force when imagining the caisson foam (1), and each of the connecting frames are formed to protrude upward from the outer and inner wall formwork. The hydraulic jacks 4 are respectively provided.

Each of the outer wall formwork 1A and the inner wall formwork 1B is provided with plates 5a and 5b for forming the reinforced concrete placing holes 2a and 2b. The work footing 7 and the handrail 8 supported by the bracket 6 are installed, and a safety net mounting stand 10 is formed below the work footing to allow the safety net 9 to be installed.

The upper end of the inner wall formwork 1B is formed with a work scaffold 11 composed of a plurality of iron plates on a support frame (not shown) woven in a grid, and each work scaffold 11 of the inner wall formwork 1B is formed. ) Are configured to function as a workbench for installing a hydraulic supply device (not shown) for supplying hydraulic pressure to each of the plurality of hydraulic jacks (4) and other devices required for the operation of the caisson form (1).

Each plate 5a, 5b of the inner and outer wall formwork is reinforced by a plurality of vertical reinforcing frames 12 and a horizontal reinforcing frame 13, by horizontal reinforcing frames 13 of an outer wall formwork. It is reinforced, and the stable net mounting platform 10 is attached to a bracket 6 for supporting the horizontal connecting rod 14 and the work platform 7 connected to the horizontal reinforcement frame 13 of the formwork for the outer wall.

Then, each connecting frame 3 connecting the inner and outer wall formwork of the caisson form 1 is connected to the extension frame 15 to form a roof frame, and then the caisson form itself on the roof frame. A mobile frame 6 for lifting a crane is installed, and the caisson form of the present invention is installed on the roof frame by installing hydraulic lines and electric wirings for supplying hydraulic pressure to the respective hydraulic colors 4. It is configured to operate on its own.

As described above, the operation of constructing a caisson, other effects thereof, and a method of continuously constructing a caisson will be described.

First, the operation of constructing the caisson 100 from the reinforced concrete as the caisson foam 1 of the present invention will be described as an example of FIGS. 3 and 4 showing a part of the caisson foam 1, and FIG. ) Is a diagram showing a state in which concrete mortar is poured into reinforced concrete placing holes (2a) and (2b) in a state where the height is raised to a predetermined height. After the concrete mortar is poured above the pour hole (2a) and (2b), it waits for a time (about 1 hour) to harden the concrete mortar, and then the caisson form (1). It raises itself, and the degree of hardening is such that even if the caisson form is moved up and down, the poured concrete is not damaged, and the thickness of the pouring is about 30 cm, and the plates 5a and 5b constituting the pouring hole are Height is about 12 Since the concrete mortar, which is poured at the top of the pour ball, is out of the lower part of the plates 5a and 5b, it is four times as long as 1 hour after pouring about 1/4, so at least 4 hours have elapsed. Concrete out of play is completely hardened.

As described above, after the concrete poured on the top of the pouring holes 2a and 2b is cured, the plate is placed to provide a space for pouring concrete mortar on the top of the plates 5a and 5b. Since it is necessary to raise, the hydraulic jack 4 is operated as shown in the example of FIG. 4, in which the upper clamping portion 4b of the hydraulic jack 4 releases the round bar 17 during the lifting operation of the hydraulic jack 4. On the contrary, the lower tightening part 4a is in a state where the round bar 17 is tightly tightened and the piston connected to the lower tightening part is released from the cylinder body. In this case, the round bar 17 itself is a caisson ( Since the piston is continuously connected to the height of the caisson under the state of being supported on the base 104 of the piston 100, the piston which appears and operates by the lower clamping portion 4a that is tightening the round bar is connected to the hydraulic jack (3) attached to the frame (3). 4) push the cylinder body This action is to act on each of the plurality of hydraulic jacks (4) arranged to lift the caisson form (1) itself uniformly, so that the caisson form itself is constant by the sliding action of each hydraulic jack. It moves up to a height (about 30 cm) to form a pour hole for placing large concrete mortar at the upper end of the plates 5a and 5b. When the tightening operation is released to (4a) and the tightening force is applied to the upper tightening part 4b, the hydraulic jack 4 is fixed at the raised position, and the piston that appeared appears to immerse the rising operation and wait for the next rising movement operation. Under these conditions, the caisson form is repeated by repeating the work of pouring concrete mortar on the newly formed pour hole using a concrete pump car. It is possible to build the caisson while moving the sieve by a certain height, the caisson form of the present invention, the inner and outer wall formwork is connected in an integrated state by forming a concrete mortar pour ball by a plurality of connecting skeletons As the hydraulic jacks attached to each of the frames move up and down by the same height at the same time, the caisson construction air can be shortened as well as the caisson as compared to the sliding method of dismantling and assembling the conventional formwork. The equipment and personnel required for construction are greatly reduced, and the caisson foam of the present invention constitutes a work platform and a railing around the upper part of the inner wall formwork forming the caisson hole and the outer side of the outer wall formwork. It is possible to prevent it in advance, and also Safety nets can be installed on the safety net mounting platform under the working platform to prevent concrete mortars from falling around the work site during the concrete mortar placing work. The caisson outer wall outside the caisson form was configured to repair and check.

Referring to the construction method for constructing a large number of caissons as a faster air using the caisson foam of the present invention as described above, first of all the caisson to be built according to the construction conditions, such as the construction site and quantity of caisson It is possible to simultaneously build a number, for example, one or two or more into one group, in which case, the caisson in the present invention is to prepare a caisson form with twice the number of divided groups. The caisson continuous construction method of the present invention will be described with reference to the minimum unit of the continuous construction method, and based on the minimum unit of the construction method that can continuously build such caisson.

FIG. 6 is a view for explaining the caisson continuous construction method of the present invention. In this embodiment, two caissons are constructed in a group as one construction group, and the number of caisson foams 1 required at this time is shown. 4 is the minimum unit of the caisson continuous construction method.

As shown in FIG. 6, the two caissons 100 shown on the left side of the drawing are in a completed state, and two of the middle parts of the figure are in a state of construction in Jinhae, and two of the caissons on the right side in the figure are caissons. If only the basic 104 is made, the continuous construction method described in more detail, the first two caissons to be constructed when the caisson is completed when the caisson form (1) being used for the caissons are completed Next, it is a state in which the foundation 104 is completed in advance so that it can be installed directly on the foundation 104 of the caisson to be constructed (see the right part of the drawing), and thus the caisson at the top of the completed caisson 100. When the cable 105 of the crane is tied to the moving frame 16 installed on the roof frame of the foam 1 and pulled upward, the caisson form 1 is released above the caisson, Installation of the caisson form 1 on the base 104 is completed by simply moving the caisson form onto the base 104 on which the caisson form 1 is to be constructed next using a crane (see FIG. 6). The left one of the grouping units on the left side is already installed on the base of the caisson form has been moved, and the right side shows the state being moved from the completed caisson), while the movement of the caisson form 1 is in progress The group building unit of the section will be able to continue the construction process of the caisson while the construction of the caisson is in progress.

Such a continuous construction method of the present invention has a caisson form used in the two group unit construction tank can be carried out continuously without stopping the construction process of caissons can significantly shorten the construction period required to build a large number of caissons Not only is it effective, it is possible to construct two groups of units and build them in a continuous process, which can significantly reduce the number of workers put into construction, thus lowering the manufacturing cost of caisson. It is a very innovative construction method that contributes to the construction of water barrier construction more firmly and completely by reducing construction cost and air.

Claims (3)

A large rectangular outer wall formwork (1a) and a plurality of inner wall formwork (1b) formed of a small rectangular shape on the inside thereof to form the hole 101 of the caisson, but the outer wall formwork (1a) and the inner wall formwork Each of the dies are connected to each other by a plurality of connecting frameworks 3 so that a reinforced concrete pour hole formed of a plate forming the outer wall 102 and the connecting wall 103 of the caisson is formed between each one. The connecting frames 3 allow the outer and inner wall dies 1a and 1b to form a single piece of caisson form 1, and at the same time, the caisson form 1 itself when the hydraulic jack 4 is installed thereon. After placing and hardening concrete mortar at a certain height to the electric placing hole, the caisson form (1) itself can be raised by a certain height by the operation of the hydraulic jack (4) jack. Also each connecting bone The caisson, which is configured to move the caisson form itself by hooking the cable of the crane to the movable skeleton 16 after the construction of the caisson is completed on the upper end of the extension skeleton (15) attached to the jaw Form. The work restraint (7) and safety net mount (9) having a handrail (8) formed integrally with the outer wall formwork (1a) of the caisson form; The caisson form, characterized in that the work step 7 formed on the upper end of the inner wall formwork (1b) is integrally formed on the caisson form. One or two caissonforms into one group unit group, and then two group unit group groups were sequentially put into the construction work, and the group unit group that was put into the construction work was completed. When the caisson construction process is in progress, and the third construction caisson is completed, only the foundation is completed. The second construction process proceeds with the construction of the caisson form that was used for the completed caisson. A case continuous construction method that continuously constructs a caisson repeatedly.