JP6385753B2 - Caisson press-fitting method using jack structure - Google Patents

Description

The present invention relates to a caisson press-in method using a jack structure.

Caisson can make bridge foundations for roads, railways, etc. Compared with the caisson and cast-in-place pile method, the quality and rigidity when constructed on the ground is better than the structure constructed underground. Have.
In addition, the cast-in-place pile method requires a foundation plate with a large area, whereas the area occupied by the caisson foundation is small and can exert its superiority when constructed in constricted areas such as urban areas. It can be widely used for foundations, shafts, river repair work, building foundation work, basement work, etc.
According to “Taiwan Public Road Process (Taiwan Road Construction)” published in 2011, the conventional caisson method currently used in Taiwan has adopted the method of sinking the caisson by loading the body weight or auxiliary load. .
Although the construction period is short and the cost is low, the caisson settlement is uneven in the construction process, the verticality shifts, and it is impossible to correct the distortion. Due to construction failure, an unexpected eccentric bending moment is generated in the caisson, which lowers the long-term loading usage rate of the chassis.
The caisson press-in method can improve the disadvantages of the conventional caisson method.
The caisson press-fitting method has high-precision installation capacity, and uses multiple hydraulic jacks with a total load (jack capacity) of several hundred to several thousand (tons) installed on the upper part of the caisson. By operating the jacks in cooperation with each other, it is possible to effectively perform a highly accurate settlement operation.
Its main function is that the anchor placed in the basement bears the press-fitting reaction force, and the jack uses the action of alternately loosening and tightening the upper and lower (clamp) of the bamboo knot-like steel rod (gripper rod), The clamp (gripper) transmits the force of the hydraulic jack, which excels the resistance of the blade edge and the soil frictional force around the frame, accurately presses the open caisson into the ground, and avoids overdigging and ground collapse. .
As can be seen from the above description, the caisson press-fitting method allows the anchor to react and the jack to be used smoothly by the bamboo knot-like steel bar transmitting the force sequentially.

Also, known construction methods such as bridges and shafts, anchors and tension members of PC steel rods are combined to bear the jack reaction force. For example, in the caisson press-in method, pressure is applied downward using a jack. , Digging in the caisson, proceeding with the sinking, forcibly penetrating the edge of the caisson bottom into the soil by the reaction force of the jack to reach the predetermined depth, and then excavating the soil in the caisson again, this is a conventional method This is effective in preventing problems that cause sediment in the caisson, which can be a problem, and is capable of effectively controlling the accuracy by minimizing the influence on the surrounding soil.
In combination with the aforementioned members, the existing technology is often implemented using a center hole hydraulic jack, the tension member is installed in the hollow portion of the hydraulic jack, and the tension member is fixed to the hydraulic jack and connected. Further, the hydraulic jack is driven and the upper part of the caisson body is pushed to sink to a predetermined position.

Furthermore, in order for the caisson press-fitting method to be applied smoothly, it is necessary to sequentially transmit the reaction force generated from the jack and the anchor to the bamboo knotted steel rod (gripper rod).
Therefore, whether or not the anchor is securely installed is closely related to the accuracy and strength of the construction process.

The conventional caisson method can dig up and collapse the surrounding ground, thereby sinking the caisson, but there is a possibility of damaging the surrounding area such as eruption and uplift of earth and sand. In this case, a press-fitting caisson method is used.
The reaction force anchor is placed underground and the force is guided to the hydraulic jack by a clamp (gripper), and the power of the hydraulic jack is superior to the edge resistance and peripheral friction force of the caisson press-fitting method.
However, in the deep foundation work, the current caisson press-in method cannot perform high-precision construction, and the caisson press-in method has room for improvement.

  As can be seen from the description of the press-in caisson method described above, the press-in caisson method allows the anchor to react and the jack can be used smoothly by the bamboo knot-like steel bar transmitting the force in sequence.

The above-mentioned center hole jack needs a satisfactory tonnage (jack capacity), and is installed at the end of several girders on the upper part of the caisson if necessary.
However, the existing center hole jack needs to be specially ordered, the cost is relatively high, and the jack tonnage (jack capacity) required for another construction is not the same, and it was used after one construction was completed. Custom center hole jacks are not easy to use again and are a kind of wasted expense for construction companies.

As can be seen from the description of the caisson press-fitting method described above, in order for the caisson press-fitting method to be applied smoothly, it is necessary to sequentially transmit the reaction force generated from the jack and anchor to the bamboo knotted steel rod (gripper rod). is there.
Therefore, whether or not the anchor is securely installed is closely related to the accuracy and strength of the construction process.

An object of the present invention is to show a caisson press-fitting method that enables high-precision construction by applying a jack structure .

Therefore, in order to eliminate the above-mentioned inconvenience, the present invention includes a caisson press-fitting method using a jack structure including one pre-process, one construction process, and one press-fitting process. Includes anchor placement, concrete placement and post-curing tensile tests, and installation of countersunk plates and metal blades. Construction process includes scaffolding construction, rebar and formwork assembly, concrete placement, curing Including the dismantling of the completed formwork, the press-fitting process, which is a feature of it, includes excavation of one press-fitting equipment and the inner soil, and the press-fitting equipment is a center hole jack, a caisson connected to a reaction force girder, a jack The center hole jack and the anchor are connected to take a reaction force, and the center hole jack sinks the caisson. Drain the earth and sand first, loosen the second clamp (lower gripper) first, drive the second cylinder with hydraulic pressure, and then again pull the tension member (gripper rod) with the second clamp (lower gripper) at another stage. The first clamp (upper gripper) is tightened and the first cylinder (upper gripper) driven by electricity provided to fix the tension member (gripper rod) is loosened and the first cylinder is driven hydraulically. The caisson is submerged with a center hole jack again, and the caisson is submerged to a predetermined depth by repeating this procedure . The jack structure is driven by at least one hydraulically driven first board and second board. The first substrate and the second substrate each include one through hole, the first substrate through hole and the second substrate through hole are installed corresponding to each other, and the drive unit is Each of which includes an outer cylinder and an inner cylinder, each of the outer cylinders being installed on the first board, the inner cylinder being connected to the outer cylinder and the second board, and the first clamp (upper gripper ) is characterized Rukoto installed in the through hole of the second substrate.
Furthermore, it is a kind of jack structure, and is applied to the caisson press-fitting method. The jack structure has one first substrate and one second substrate, and the first substrate and the second substrate have through holes, respectively. The through hole of one substrate and the through hole of the second substrate are installed so as to correspond to each other, and at least one drive unit that is hydraulically driven is around the through hole of the first substrate and the second substrate. Each includes an outer cylinder and an inner cylinder, the outer cylinder is installed on the first substrate, and the inner cylinder is connected to the outer cylinder and the second substrate .

The present invention is a kind of caisson press-fitting method using a jack structure, and includes one pre-process, construction process, and press-fitting process. The pre-process includes installation of anchors for reaction force and concrete injection and tensile test after curing, and further installation of a plate and metal blade. The construction process includes scaffolding, reinforcing bars, formwork, concrete injection, Curing, including formwork dismantling after completion.
Its features are as follows.
The press-fitting process includes the installation of one press-fitting equipment and the excavation of the earth and sand, and the press-fitting equipment is joined to one reaction hole girder and one center hole jack, reaction girder. The caisson includes a plurality of blocks of tension members (gripper rods) installed in the center hole jack and extending downward. The center hole jack includes one outer cylinder, one inner cylinder installed in the outer cylinder, and outer cylinder. Has one first clamp (upper gripper) and the inner cylinder has one second clamp (lower gripper).
After discharging the earth and sand, the first clamp (upper gripper) is loosened to apply hydraulic pressure to the first cylinder, and then the first clamp (upper gripper) is tightened again to generate a reaction force on the anchor.
The caisson is submerged using the center hole jack. At that time, the inner sediment is discharged again, the second clamp (lower gripper) is loosened first, the hydraulic pressure is applied to the second cylinder, and then the second clamp (lower gripper again). ) Is tightened at another stage of the tension member, and the caisson is further sunk using a center hole jack.
By repeating this process, the caisson is submerged to a predetermined depth.
A feature of the present invention is that the caisson press-fitting method is made highly accurate by applying a center hole jack structure having a first clamp (upper gripper) and a second clamp (lower gripper).

In order to achieve the object, the present invention provides a kind of bamboo knot-like steel bar, which includes the following.
One convex connecting part, the convex connecting part is provided at one end of the bamboo knot-shaped steel rod, one concave connecting part, the concave connecting part is provided at the other end of the bamboo knot-shaped steel bar, The concave connecting part can be joined with the convex connecting part of another bamboo steel rod, and there is one connecting part, the connecting part is in the middle of the convex connecting part and the concave connecting part, and the connecting part fits into the jack. It is.
In addition, the present invention provides a kind of bamboo knot-like steel bar, including one body, the body including at least one convex connecting portion and at least one concave connecting portion, One convex connecting portion is provided at one end of the main body, one concave connecting portion is provided at the other end of the main body, and the concave connecting portion at one end of the main body is the convex connecting portion of another main body. The connecting portion is between the convex connecting portion and the concave connecting portion, and the connecting portion is fitted into the jack.
In addition, the outer edge of the bottom side surface of the concave connecting portion of the bamboo knot-shaped steel rod described above, the outer edge of the upper side surface of the adjacent convex connecting portion, and one fixing device (adjusting coupler) are connected to provide a reaction force to the jack. The
The structure of the present invention is applied to the caisson press-fitting method, and its quantity can be changed according to the settlement height or the loadable weight, and the connecting part can be installed on the jack so that the reaction force of the jack can smoothly sink the caisson. To.

The present invention is a kind of jack structure and is applied to the caisson press-fitting method.
The jack structure includes the following items.
The first substrate and the second substrate each have one through-hole, and the first substrate through-hole and the second substrate through-hole are mutually connected. Correspondingly installed, there is at least one hydraulically driven drive unit around the through hole of the first substrate and the second substrate , each of which has one outer cylinder and one inner cylinder, The outer cylinders are respectively installed on the first substrate, and the inner cylinder is connected to the outer cylinder and the second substrate.
In addition, there is one first clamp that is driven by electricity, and the first clamp is used to fix a caisson press-fitting tensile member, and the first clamp is installed in the through hole of the second substrate.
The advantages of the present invention can be applied to a tensile member and an anchor when combined, that is, applied to the caisson press-in method, and the structure of the present invention is a special high tonnage that is adopted by the existing caisson press-in method. The disadvantage of the low overlap usage rate of the center hole jack can be overcome.

In order to achieve the aforementioned object, the present invention provides a kind of anchor structure.
It includes one anchor structure (anchor coupler), which includes one connecting rod, one end of the connecting rod is provided with a connecting portion, and further includes one steel wire accumulator, Around the steel wire accumulator is a steel wire anchoring portion where a plurality of steel wires can be installed.
The feature of the present invention is that the steel wire can be reliably and stably fixed, and the jack provides a downward force by connecting the bamboo knotted steel rod (gripper rod) and transmitting the anchor reaction force to the jack.
The present invention is applied to the caisson press-fitting method.

FIG. 1 is a flowchart of the present invention. Example 1 FIG. 2 is a sketch (1) of the implementation of the present invention. Example 1 FIG. 3 is a sketch (2) of the implementation of the present invention. Example 1 FIG. 4 is a sketch (3) of the implementation of the present invention. Example 1 FIG. 5 is a sketch (1) of continuous operation of the center hole jack at the time of press-fitting according to the present invention. Example 1 FIG. 6 is a schematic diagram (2) of continuous operation of the center hole jack during press-fitting according to the present invention. Example 1 FIG. 7 is a diagram (3) showing the continuous operation of the center hole jack during press-fitting according to the present invention. Example 1 FIG. 8 is a sketch of caisson press-fitting according to the present invention. Example 1 FIG. 9 is a sketch of the tension member (gripper rod) of the present invention. Example 1 FIG. 10 is a three-dimensional view of the center hole jack in the press-fitting process of the present invention. Example 1 FIG. 11 is an implementation sketch of the present invention with the center hole jack. Example 1 FIG. 12 is a three-dimensional view of the first embodiment of the present invention. (Example 2) FIG. 13 is an exploded sketch of the first embodiment of the present invention. (Example 2) FIG. 14 is an assembly sketch of the first embodiment of the present invention. (Example 2) FIG. 15 is a three-dimensional view of the second embodiment of the present invention. (Example 2) FIG. 16 is an assembly sketch of the second embodiment of the present invention. (Example 2) FIG. 17 is an implementation sketch of the present invention. (Example 2) FIG. 18 is an operation sketch (1) of the present invention. (Example 2) FIG. 19 is an operation sketch (2) of the present invention. (Example 2) FIG. 20 is an operation sketch (3) of the present invention. (Example 2) FIG. 21 is a three-dimensional sketch of the structure of the present invention. (Example 3) FIG. 22 is a side view of the structure of the present invention. (Example 3) FIG. 23 is a sketch of the tension member of the present invention. (Example 3) FIG. 24 is a sketch when the structure of the present invention is actually implemented. (Example 3) FIG. 25 is a three-dimensional exploded view of the present invention. Example 4 FIG. 26 is a three-dimensional assembly drawing of the present invention. Example 4 FIG. 27 is a three-dimensional assembly drawing of another embodiment of the present invention. Example 4 FIG. 28 is a sketch (1) in which a steel wire is fixed using the present invention. Example 4 FIG. 29 is a sketch (2) in which a steel wire is fixed using the present invention. Example 4 FIG. 30 is a sketch when the present invention is actually implemented. Example 4

  Embodiments of the present invention will be described below in detail with reference to the drawings.

Refer to Figure 1.
The present invention includes a pre-process 1, a construction process 2, and a press-fitting process 3.
Refer to Figure 2.
The pre-process 1 includes placing an anchor 11 for reaction force, performing a tensile test after concrete pouring and curing, and further installing a plate and a metal blade.
If it explains in detail, the pre-process 1 will start from construction of the ground, and drilling will be provided by a heavy drilling machine, and the steel wire of the anchor 11 will be inserted into the drilling. To do.
After installation, the necessary number of anchor connectors (adjust couplers) 12 and adjustment plates (anchor couplers) 13 (see Fig. 4) necessary for the press-fitting equipment, and the ground conditions are improved by looking at the ground conditions. Install in advance.
The construction process 2 includes installation of scaffolding, rebar, formwork assembly and concrete placement, and formwork dismantling after curing.
The construction process 2 and the previous process 1 are both the same series of known construction methods, and the main feature of the present invention is the press-fitting process 3.

The press-fitting process includes the press-fitting equipment 4 and the internal earth and sand excavation shown in FIGS. 3 to 8, and the press-fitting equipment 4 includes a reaction hole girder 41 and a center hole jack 42 connected to the reaction girder, a caisson connected to the reaction force girder, The center hole jack includes a plurality of pulling members (gripper rods) 44 that are installed in the center hole jack and extend downward. The center hole jack includes one outer cylinder 45 and an inner cylinder 46 installed in the outer cylinder 45.
The outer cylinder includes one first clamp (upper gripper) 451, and the inner cylinder 46 includes a second clamp (lower gripper) 461.
After discharging the earth and sand, the first clamp (upper gripper) 451 is loosened, the hydraulic cylinder is applied and the outer cylinder is driven, and then the first clamp (upper gripper) 451 further fixes the tension member (gripper rod) 44 1. The step is sandwiched, the reaction force is taken by the anchor 11, the anchor connector (adjust coupler) 12, and the adjustment plate (anchor coupler) 13, and the caisson 43 is submerged by the center hole jack 42.
At that time, the earth and sand inside the caisson 43 is again discharged, the second clamp (lower gripper) 461 is first loosened, the hydraulic cylinder is applied to drive the second cylinder 46, and then the second clamp (lower gripper) is again pulled by the tension member ( The first clamp (upper gripper) 451 is further loosened, the first cylinder 45 is driven by applying hydraulic pressure, and the first clamp (upper gripper) 451 is pulled by a tension member ( Tighten it at another stage of the gripper rod) 44 and sink the caisson with the center hole jack 42 again.
This procedure is repeated to press-fit the caisson to a predetermined position.

In addition to this, the present invention further includes one completion step, in which the concrete is poured into the underwater slab after cleaning the mud accumulated at the bottom.
To explain in detail, after inserting the caisson, clean the mud of the blade edge and place underwater concrete to prevent water leakage inside the caisson. Finally, drain the water inside the caisson, and then lay the bottom slab concrete after rebar assembly. Set up.

The aforementioned tension member (gripper rod) 44 must be implemented by a cylindrical body made of metal.
Further, it may have a structure in which, for example, a male and female screw are combined, or, as shown in FIG. 9, a tension member (gripper rod) 44 is implemented with a single bamboo knot structure.
It includes one convex connecting portion 441, one concave connecting portion 442 and one connecting portion, and the convex connecting portion 441 is disposed at one end of a tension member (gripper rod) 44, and the concave connecting portion 442 is a tension member. (Gripper rod) 44 is installed at another end, and the convex connecting portion 442 is provided as a convex connecting portion of another tension member (gripper rod) (not shown), and the connecting portion 443 is a convex connecting portion. The system of 441 and concave articulation 442 and concave articulation 442 is provided with corresponding screws.

In addition to the center hole jack described above, the present invention must also be implemented with another form of jack structure 42a as shown in FIGS.
The jack structure 42a includes a first substrate 421a and a second substrate 422a, and includes a first clamp (upper gripper) 451a that is driven by electricity and a drive unit 48a that is driven by at least one hydraulic pressure.
Among them, the first substrate 421a has one through hole 471a, and the second substrate 422a has one through hole 472a, which accommodates the tension member (gripper rod) 44, The through hole 471a of the first substrate 421a and the through hole 472a of the second substrate 422 are installed so as to correspond to each other.
The first clamp (upper gripper) 451a is used to fix the tension member (gripper rod) 44 adopted by the caisson press-fitting method, and the first clamp (upper gripper) 451a is installed in the through hole of the second substrate 422a. In addition, a suspension piece 49a is provided on the second substrate 422a, and the jack structure 42a is suspended to a predetermined position by connecting instruments.
As described above, the center hole jack 42a is installed to be implemented by four drive units 48a.
That is, there are four hydraulic jacks. Each drive unit 48a includes one outer cylinder 481a and one inner cylinder 482a. The outer cylinders 481a are respectively installed on the first substrate 421a. It is installed in the outer cylinder 481a and connected to the second substrate 422a.
In addition, the drive units 48a are respectively disposed on the second substrate 422a, and a space 5 in which a tension member (gripper rod) 44 can be installed is provided between the drive units 48a. It has been.
The jack structure 42a further includes first and second clamps (lower gripper) (not shown) that are driven by electricity, and the corresponding first clamp (upper gripper) 451a is a tensile member (caisson press fitting method) Gripper rod) 44 is used for fixing.
The second clamp (lower gripper) is installed in the through hole 471a of the first substrate 421a. Therefore, the present invention can apply the press-fitting step 3 by applying the center hole jack 42a.

As described above, in all such cases, such as adjacent construction considering the surrounding ground, construction with insufficient occupied area, accuracy of vertical and horizontal accuracy is required, and there is no suitable construction method on soft ground In addition, the caisson press-in method using the jack structure of the present invention can be used, and high-precision construction is possible.
However, the purpose of the above-described implementation method is that a technician who is familiar with the corresponding item fully understands the content of the present invention and implements it based on it, and limits the scope of the embodiment of the present invention. It is not a thing.
Therefore, the so-called equivalent change and modification of the shape, structure, and characteristics described in the scope of application of the present invention should be included in the scope of the patent of the present invention.

  Hereinafter, specific examples will be added to the drawings, and the objects, technical contents, features, and effects that can be achieved will be described in detail.

See FIG.
The present invention provides a first embodiment of the bamboo knot-like steel bar 1.
The bamboo knot-like steel bar 1 includes one convex connecting part 11 at one end thereof and one convex connecting part 12 at another end of the bamboo knot-like steel bar 1, in which the convex connecting part 11 is provided. And the concave connecting part 12 are each implemented by a columnar body, and the convex connecting part 11 is threaded.
The concave connecting portion 12 has a screw 121 corresponding to the screw 111 of the convex connecting portion 11, and the concave connecting portion 12 is a convex connecting portion 11 a of one bamboo knot-shaped steel bar 1 a (see FIGS. 13 and 14). Another bamboo knot-like steel bar 1a can be joined to another bamboo knot-like steel bar 1b, 1c, and the others can be analogized.
Also, the outer edge of the bottom side surface of each one of the concave connecting portions 32 and the outer edge of the upper side surface of the adjacent convex connecting portion 31 can be connected with one fixing tool, and the fixing device is a clamp for the center hole jack. This is done by pinching with (gripper).

Details of operation will be described below.
Next, refer to FIG.
The bamboo knot-shaped steel rod 1 also includes one connecting portion 13, which is between the convex connecting portion 11 and the concave connecting portion 12, and the connecting portion 13 is a cone having a slope. In this embodiment, a conical columnar body is used and installed in the center hole jack of the caisson press-fitting method.
Next, see FIG.
As a second embodiment of the present invention, this bamboo knot-shaped steel bar 2 includes one main body 3.
The main body 3 includes a plurality of convex connecting portions 31x, 31y, 31z, a plurality of concave connecting portions 32x, 32y, 32z, and a plurality of connecting portions 33.
The one convex connection part 31x is installed at one end of the main body 3, and the one concave joint part 32z is installed at the other end of the main body 3, and is concave with the convex connection parts 31x, 31y, 31z. The connecting portions 32x, 32y, and 32z are each implemented as a columnar body.
One convex connecting portion 31 has a screw 311 (having a plurality of threads), and the concave connecting portion 32z has a screw 321 corresponding to the screw 311 of the convex connecting portion 31x.
Further, the outer edge of the bottom side surface of each one of the concave connecting portions 32 and the outer edge of the upper side surface of the convex connecting portion 31 adjacent thereto are connected by one fixing device, and the fixing device is a clamp (gripper) of the center hole jack. It is carried out by holding it between.
The connecting portion 33 is located between the convex connecting portion 31 and the concave connecting portion 32. A plurality of connecting portions 33 can be installed, and the connecting portion 33 is implemented as a columnar body having an inclination.
In the present embodiment, for example, three are installed as a conical columnar body, and are installed in a center hole jack of the caisson press-fitting method.

See also FIG.
The bamboo knot-like steel rod 2a can be joined to another bamboo knot-like steel rod 2a, and the explanation is necessary because the main body 3 of the bamboo knot-like steel rod 2 in this embodiment is the bamboo knot-like steel rod 1 in the first embodiment. Are combined, and can be formed integrally.

See FIG. 17 below.
The structure of the second embodiment will be described to show how the present invention is applied.
First, in the caisson press-fitting method, a reaction force anchor A is driven using a heavy drilling machine, and a steel blade is installed at a predetermined position.
Construction of scaffolding, rebar and formwork assembly, concrete placement after assembly completion, dismantling the formwork and starting the installation of press-fit equipment as shown in Fig. 5. 41, a hydraulic center hole jack 42, an anchor A and a fixture (not shown) are connected and fixed at an anchor structure 43 above the reaction force girder, and further connected to the bamboo knot-like steel bar 2 Fixed.

See FIGS. 18 to 20 below.
How the present invention is applied to the operation of the center hole jack 42 will be described.
As shown in FIG. 18, the center hole jack has two upper clamps 421 (upper grippers) and two lower clamps 422 (lower grippers). And the 1st node of another bamboo knot-like steel bar 2a is clamped.
Furthermore, the upper clamps (upper grippers) 421 are respectively clamped by symmetrically sandwiching the bottom outer edge of the first joint concave connection portion 32x and the upper outer edge of the second joint convex connection portion 31y of the bamboo knot-like steel rod 2. .
Further, the center hole jack 42 further has a drive unit that is hydraulically driven.
As the caisson work proceeds, the lower clamp 422 spreads by moving downward on the conical outer edge of the connecting portion 33. Finally, as shown in FIG. The bottom outer edge of the concave connecting portion 32 of the first node of the bamboo knot-shaped steel bar 2 and the upper outer edge of the convex connecting portion 31 of the second node are sandwiched symmetrically.
Subsequently, the upper clamp 421 extends downward by moving the conical outer edge of the connecting portion 33 downward. Finally, as shown in FIG. 20, the upper clamp 421 is connected to the concave joint of the second node of the bamboo knot-shaped steel rod 2. It moves to the outer edge of the bottom part of the part 32y and the upper outer edge of the convex connection part 31z of the third section, and is clamped.
In this way, in the applied caisson press-in method, the press-in and excavation processes are repeated and the construction of each layer is advanced.

As described above, the effect of the present invention lies in the application of the press-fitting caisson method, and the structure that guides the reaction force of the anchor to the center hole jack provides the reaction force to the jack and smoothly sinks the caisson.
The length and number of the structure of the present invention are determined by the press-fitting depth and the loading load.
In addition, the design of the slope of the connecting part can utilize the installation status of the center hole jack, special equipment that can construct caissons for each section with the bamboo knot-like steel rod of the present invention, and compresses the air pressure during construction The construction cost is low, the excavation and removal of the internal sediment are easy, and the construction period can be shortened.
However, the purpose of the above-described implementation method is that a technician who is familiar with the corresponding item fully understands the content of the present invention and implements it based on it, and limits the scope of the embodiment of the present invention. It is not a thing.
Therefore, the so-called equivalent change and modification of the shape, structure, and characteristics described in the scope of application of the present invention should be included in the scope of the patent of the present invention.

  Hereinafter, specific examples will be described with reference to the drawings, and the object, technical contents, features, and effects that can be achieved will be described in detail.

See FIGS. 21-23.
The jack structure J of the present invention is applied to the caisson press-fitting method, and the jack structure J has one first substrate 1 and one second substrate 2, one first clamp 3 driven by electricity, and at least one driven by hydraulic pressure. One drive unit 4 is included.
Among them, the first substrate 1 and the second substrate 2 are respectively a bottom plate and an upper lid of the drive unit 4, the first substrate 1 has one through hole 11, and the second substrate 2 also has one through hole 21. The through-hole 11 of the first substrate 1 and the through-hole 21 of the second substrate 2 are installed corresponding to each other to sequentially transmit the anchor reaction force to the tension member, and the first clamp 3 is caisson press-fitted The tension member 65 employed in the construction method is fixed, and the first clamp 3 is installed in the through hole 21 of the second substrate 2.
In addition, the jack structure J includes one second clamp (not shown) that is driven by electricity, and the second clamp is installed in the through hole 11 of the first substrate, and the first clamp Correspondingly, the tensile member 65 of the caisson press fitting method is fixed.
In addition, there are two suspension pieces 22 on the second substrate 2, which is a tool that can suspend the jack structure J of the present invention to a predetermined position.

The drive unit 4 of the present invention is implemented by installing four hydraulic jacks. Each drive unit 4 includes one outer cylinder and one inner cylinder, and the outer cylinder 41 is installed on the first substrate 1. The inner cylinder 42 is connected to the second substrate 2 in the outer cylinder 41.
However, since the principle and basic structure of details are existing technologies, they will not be described here.
In addition, the drive unit 4 is installed side by side on the second substrate 2, and a single installation space 5 in which a tension member is installed is formed between the drive units 4 (plural).
The aforementioned tension member 65 is implemented as a metal column, and the column may have a coupling structure such as a bolt and a nut.
In addition, one bamboo knot-like tension member 65 as shown in FIG. 3 includes one convex connecting portion 651, one concave connecting portion 652, and one joint portion 653. The part 651 is installed at one end of the tension member 65, its concave connection part 652 is installed at another end of the tension member 65, and the concave connection part 652 is a convex connection of another tension member (not shown). The joint portion 653 is intermediate between the convex connection portion and the concave connection portion 652, and the convex connection portion and the concave connection portion are provided with corresponding threads, so that many tensile members 65 are provided. Can be connected one after another.

See FIG. 24 below.
A state in which the present invention is actually used will be shown and described.
The previous process of caisson press-fitting work includes surveying, sheet pile installation, casing drilling, anchor installation, etc. After the pre-process is completed, caisson construction and press-fitting work can be started. The reaction force girder 61, the bearing plate 62, and the caisson main body 63 are installed, and the press-fitting work is performed by installing the jack structure J on the reaction force girder 61 and further attaching the bamboo knot-like tension member 65 to the through-hole 11 of the jack structure J. 21 and connected to the anchor 64 which has been installed earlier.
At this time, the first clamp 3 is driven electrically to fix the tension member 65, and the outer shell 41 of the drive unit 4 driven by the hydraulic system is moved downward, that is, the upper part of the caisson body 63 is moved downward. After pushing and pushing downward, the first clamp 3 is repeatedly loosened and fixed, and then the drive unit 4 is driven again to push the upper part of the caisson body 63 down and repeat the operations described so far. The caisson body 63 is submerged to a predetermined position.

In summary, the present invention is a jack structure J formed of a first substrate 1, a second substrate 2, a first clamp 3, and a drive unit 4, and is repeatedly used in different constructions using the caisson press-fitting method. There is an advantage that cost can be saved by being able to do it.
However, the purpose of the above-described implementation method is that a technician who is familiar with the corresponding item fully understands the content of the present invention and implements it based on it, and limits the scope of the embodiment of the present invention. It is not a thing. Therefore, the so-called uniform change and modification of the shape, structure and characteristics described in the scope of application of the present invention should be included in the scope of the new patent.

  Hereinafter, specific examples will be described with reference to the drawings, and the object, technical contents, features, and effects that can be achieved will be described in detail.

See FIG. 25 and FIG.
The present invention is a kind of anchor structure (anchor coupler) 1 and includes the following.
One connecting rod 2, one steel wire accumulator 3, and one steel wire departure prevention tool 4.
Among them, there is a connecting portion 21 at one end of the connecting rod 2, and the connecting portion 21 is threaded for execution, and the connecting portion 21 is a corresponding bamboo node steel rod (gripper rod). Or the connecting portion 21 is connected to an anchor connector (adjusting coupler) and further connected to a bamboo bar-like steel rod (gripper rod), and the connecting rod 2 has a first head 22. doing.
The steel wire accumulator 3 has one through-hole 31 in the center, which is installed between the connecting portion 21 and the first head 22 of the connecting rod 2, and further, the steel wire accumulator 3 is connected to the connecting rod 21. The rod 2 can be connected without being fixed, and the first head 22 is fitted on the rod 2 so that a bamboo knotted steel rod (gripper rod) can be easily assembled.
Further, there is a steel wire fixing portion 32 around the steel wire accumulator 3 where a plurality of steel wires can be installed.

In addition, the steel wire accumulator 3 includes one second head 33, and the steel wire escape prevention device is annular and is fitted into the second head 33 without being fixed. 3, the steel wire departure prevention tool can prevent the steel wire from deviating from the steel wire fixing portion.
In addition, in the above description, the connecting rod 2 and the steel wire accumulator 3 may be implemented in another form.
As shown in FIG. 27, the form does not require the steel wire departure prevention tool and the first head.
The steel wire accumulator 3a and the connecting rod 2a can be integrally formed, and the steel wire fixing portion 32a is a through hole of the steel wire accumulator 3a.
Therefore, the steel wire can be directly installed in the steel wire fixing part 32a.

Refer to FIG. 28 and FIG. 29 continuously.
How to install the twisted steel wire 5 in the steel wire accumulator 3 will be described.
For example, in the construction of one straight caisson, the depth of the anchor to be installed is 60 m, the anchor is a plurality of twisted steel wires 5 made of 20 steel wires, and the twisted steel wire 5 is 58 m long. Saga is installed in the ground.
The remaining 2 meters are on the ground, and the stranded steel wires 5 that are on the ground are installed in the steel wire fixing portion 32 one by one.
And when forming an anchor with the twisted steel wire 5, the fixing tool 6 is installed in the part near the end, and a twisted steel wire is fixed.
Subsequently, the steel wire departure prevention tool 4 can fit the fixing tool 6 and can be installed in close contact with the peripheral edge of the steel wire accumulator 3, and the stranded steel wire 5 can be separately and stably attached to the steel wire accumulator 3. Fixed.
(If another embodiment of the steel wire accumulator 3a is implemented, the stranded steel wire 5 is directly fixed to the steel wire accumulator 3a by mounting the fixture 6 described here. The steel wire departure prevention tool 4 is not necessary.)

Next, an actual application of the anchor structure (anchor coupler) 1 of the present invention will be described, so see FIG.
First, in the caisson press-fitting method, a stranded steel wire 5 for reaction force is driven using a heavy boring machine, and the stranded steel wire 5 is installed in the steel wire accumulator 3 as described above with reference to FIGS. The
At this time, a steel blade may be installed at a predetermined position.
Then, it is possible to construct the scaffolding, assemble the reinforcing bars and the formwork, cast concrete after the assembly is completed, dismantle the formwork, and then start installing the press-fitting equipment.
The press-fitting device includes one reaction force girder 71, a hydraulic center hole jack 72 installed on the reaction force girder 71, and a plurality of bamboo knotted steel bars (gripper rods) 73.
At that time, the anchor structure (anchor coupler) 1 of the present invention is coupled to a bamboo knotted steel rod (gripper rod) 73 through an anchor connector 8.
At this point, repetitive operations such as excavation and caisson press-fitting can be performed, and construction and subsidence of each layer will be implemented.

In summary, the anchor structure (anchor coupler) of the present invention can stably install a plurality of twisted steel wires (anchors), transmits an anchor reaction force to the center hole jack, and applies a downward force to the center hole jack. The center hole jack can move stably along the bamboo knotted steel rod (gripper rod), and the caisson work can be completed.
However, the purpose of the above-described implementation method is that a technician who is familiar with the corresponding item fully understands the content of the present invention and implements it based on it, and limits the scope of the embodiment of the present invention. It is not a thing. Therefore, the so-called equivalent change and modification of the shape, structure, and characteristics described in the scope of application of the present invention should be included in the scope of the patent of the present invention.

1 Pre-process 11 Anchor 12 Anchor connector (adjust coupler)
13 Adjustment plate (anchor coupler)
2 Construction Process 3 Press-in Process 4 Press-in Equipment 41 Reaction Force Girder 42, 42a Center Hole Jack 421a First Substrate 422a Second Substrate 43 Caisson 44 Tension Member (Gripper Rod)
441 Convex connection part 442 Concave connection part 443 Connection part 45, 481a Outer cylinder 451, 451a First clamp (upper gripper)
46,482a Inner cylinder 461 Second clamp (lower gripper)
471a, 472a Through hole 48a Drive unit 49a Hanging piece

Claims (2)

  The caisson press-in method using a jack structure includes one pre-process, one construction process, and one press-in process. The pre-process consists of anchor placement for reaction force and tensile test after concrete placement and curing. Implementation, including the installation of dish plates and metal blades, and the construction process includes scaffolding, rebar, formwork assembly, concrete placement, and formwork disassembly after curing The press-fitting process includes excavation of one press-fitting equipment and the inner earth and sand. The press-fitting equipment includes a center hole jack, a caisson connected to the reaction force girder, and a downwardly extending tensile member (gripper rod) installed in the jack. The center hole jack and the anchor are connected to take a reaction force, and the center hole jack sinks the caisson. At that time, the inner earth and sand are discharged again, and the second clamp (lower grip ) Is loosened and the second cylinder is driven hydraulically, and then the second clamp (lower gripper) is used to fasten the tension member (gripper rod) in another stage and fix the tension member (gripper rod). After loosening one first clamp (upper gripper) driven by electricity and driving the first cylinder with hydraulic pressure, tighten the first clamp (upper gripper) at another stage and sink the caisson again with the center hole jack By repeating this procedure, the caisson is submerged to a predetermined depth, and the jack structure includes a first substrate and a second substrate, and at least one drive unit that is hydraulically driven. Each of the first substrate and the second substrate is one The through hole is vacant, the through hole of the first substrate and the through hole of the second substrate are installed corresponding to each other, and the drive unit includes one outer cylinder and one inner cylinder, respectively. The outer cylinder is installed on the first board, the inner cylinder is connected to the outer cylinder and the second board, and the first clamp (upper gripper) is installed in the through hole of the second board. Caisson press-in method using a jack structure characterized by this.   The caisson press-in method using the jack structure includes one second clamp (lower gripper) that is driven by electricity, and the second clamp (lower gripper) is a tensile member (gripper rod) of the caisson press-in method. The caisson press-fitting method applying the jack structure according to claim 1, wherein the second clamp (lower gripper) is provided for fixing and is installed in a through hole of the first substrate.

Images