TW201531610A - Construction method of downwardly pushing caisson by using jack structure - Google Patents

Abstract

The present invention discloses a construction method of downwardly pushing a caisson by using a jack structure, which includes a pre-fabricating step, a constructing step and a downwardly pushing step, and characterized in that: the downwardly pushing step includes installing a downwardly pushing equipment and digging out internal sands and soils, and the downwardly pushing equipment includes a hollow jack formed of an inner cylindrical body having a first clamping member and an outer cylindrical body having a second clamping member, a counter force is generated by the hollow jack working in cooperation with a pulling force member and a ground anchor to push the caisson down for sinking, and the step is repeated until the caisson is push down to a predetermined depth, thereby enabling a precision construction.

Description

Pressing caisson method using jack structure

The invention relates to a press-in caisson method, in particular to a press-in caulking method using a hollow jack structure.

The caisson can be used as a bridge foundation for roads and railways. Compared with other underground piles constructed on site, the quality and rigidity of the caisson on the ground are better than those of other underground structures. In addition, compared with the underground foundation pile method, a large area of the foundation board is required, and the caisson foundation has a small occupied area. When it is constructed in a narrow space in the urban area, it can exert its advantages and can be widely used in bridge foundation engineering, shaft engineering, river improvement engineering. , building infrastructure engineering and basement engineering.
The traditional type of caisson needs to rely on over-excavation to cause the surrounding site to collapse, which in turn causes the caisson to sink. However, sanding and bulging may cause damage to neighbors. Therefore, most of the current caulking methods are used. The ground anchor is the reaction force, which is transmitted to the hydraulic jack by the clamp section, and the strength of the hydraulic jack is better than the caisson sinking method of the blade resistance and the peripheral friction.
However, in the high-depth foundation engineering, the existing press-in caisson method may not be able to accurately construct with high precision, so the pressing into the caisson method still has room for improvement.

The object of the present invention is to propose a press-in caulking method which uses a jack structure to achieve high precision construction.
The invention provides a pressing jacking method for applying a jack structure, comprising a prefabricating step, a constructing step and a pressing step, the prefabricating step comprising: laying a ground anchor for the reaction force and pouring the concrete to perform the drawing test after the health is maintained, and then performing the drawing test. The step of laying the wooden block and the metal cutting edge comprises the steps of constructing the construction frame, the steel bar, the formwork group and pouring the concrete, and demolishing the mold after the completion of the health, wherein the pressing step comprises setting a pressing device and excavating the internal sand The press-in device includes a reaction truss, a hollow jack connected to the reaction truss, a caisson connected to the reaction truss, a plurality of tension members extending through the hollow jack and extending downward, the hollow jack including a An outer cylinder body and an inner cylinder body disposed in the outer cylinder body, the outer cylinder body has a first clamp, the inner cylinder body has a second clamp, and the first clamp is released and hydraulically driven after discharging the internal soil sand After the first cylinder body, the first clamp clamps a section of the tension component to form a reaction force with the ground anchor, so that the hollow jack pushes the caisson to sink, and then re-excavates The soil sand is discharged, the second clamp is first released and the second cylinder is hydraulically driven, and then the other clamp is clamped by the second clamp, and then the first clamp is released and the first cylinder is hydraulically driven. Then, the first clamp clamps another segment of the tension member, and the hollow jack pushes the caisson to sink again, and repeats this step to press the caisson into a predetermined depth.
The invention is characterized in that a hollow jack structure having a first jig and a second jig is applied to achieve a high precision press-in caulking method.

1‧‧‧Prefade steps
11‧‧‧ Earth anchor
12‧‧‧ Ground anchor splicer
13‧‧‧ adjustment seat
2‧‧‧Building steps
3‧‧‧Pushing step
4‧‧‧Pushing equipment
41‧‧‧Resistance truss
42, 42a‧‧‧ hollow jack
421a‧‧‧First base
422a‧‧‧Second base
43‧‧‧ caisson
44‧‧‧ tensile components
441‧‧‧Protruding
442‧‧‧ recessed part
443‧‧‧ Sockets
45, 481a‧‧‧ outer cylinder
451, 451a‧‧‧ first fixture
46, 482a‧‧‧ inner cylinder
461‧‧‧Second fixture
471a, 472a‧‧‧through holes
48a‧‧‧Drive unit
49a‧‧‧ hanging pieces

Figure 1 is a block diagram of the steps of the present invention.
Figure 2 is a schematic view (I) of the implementation of the present invention.
Figure 3 is a schematic view (2) of the implementation of the present invention.
Figure 4 is a schematic view (3) of the implementation of the present invention.
Figure 5-1: Schematic diagram of the continuous operation of the hollow jack in the pressing step of the present invention (1).
Figure 5-2: Schematic diagram of the continuous operation of the hollow jack in the pressing step of the present invention (2).
Figure 5-3: Schematic diagram of the continuous operation of the hollow jack in the pressing step of the present invention (3).
Figure 6 is a schematic view of the caulking of the present invention.
Figure 7 is a schematic view of the tensile element of the present invention.
Figure 8 is a perspective view of another embodiment of the hollow jack applied to the indentation step of the present invention.
Figure 9 is a schematic view showing the implementation of the hollow jack of another aspect of the present invention.

Referring to FIG. 1, the present invention includes a prefabrication step 1, a construction step 2, and a press-in step 3. Referring to FIG. 2 together, the pre-fabrication step 1 includes the ground anchor 11 for the reaction force and the concrete is poured after the concrete is poured. Pull out the test, and then set the skid and metal cutting edge. In detail, the prefabrication step 1 starts from the ground construction, drills the drill hole, and then the ground anchor 11 steel strand is sent into the drill hole to install The anchor 11 steel hinge line is filled with the anchor on the hard ground plate, and the ground anchor adapter 12 and the adjustment seat 13 required for the subsequent pressing device are set (refer to FIG. 4), and the site condition is improved by the site condition, the rafting, etc. For the pre-operation, the construction step 2 includes constructing the construction frame, the steel bar, the template group and pouring the concrete, and demolishing the mold after the completion of the maintenance. The operation of the construction step 2 is the same as the prefabrication step 1 and the known construction method is the same. The main feature of the invention is the press-in step 3, the press-in step 3 comprising:
The press-in device 4 as shown in FIGS. 3 to 6 is provided and the internal soil sand is excavated. The press-in device 4 includes a reaction force truss 41, a hollow jack 42 connected to the reaction force truss 41, and a reaction force. a caisson 43 connected to the truss 41, a plurality of tension members 44 extending through the hollow jack 42 and extending downwardly, the hollow jack 42 comprising an outer cylinder 45 and an inner cylinder 46 disposed in the outer cylinder 44 The outer cylinder 45 has a first clamp 451. The inner cylinder 46 has a second clamp 461. After the internal sand is discharged, the first clamp 451 is released and the outer cylinder 45 is hydraulically driven. The clamp 451 clamps a section of the tension member 44 to form a reaction force with the ground anchor 11, the ground anchor adapter 12 and the adjustment seat 13, so that the hollow jack 42 pushes down the caisson 43 to sink, and the inside of the caisson 43 is again excavated. After the soil sand is discharged, the second clamp 461 is first released and the second cylinder 46 is hydraulically driven, and then the other portion of the tension member 44 is clamped by the second clamp 461, and then the first clamp 451 is released. Hydraulically driving the first cylinder 45 and then sandwiching the other portion of the tension member 44 with the first clamp 451, again The hollow caisson 43 push the jack 42 to sink, and repeat this step the actuator 43 so that the caisson pressed until a predetermined depth.
In addition, the present invention may further comprise a finishing step comprising: pouring the bottom plate to pour concrete after removing the bottom mud, in detail, after the caisson is completely pressed, performing cutting of the blade, removing the soil, and pouring the concrete in the water to prevent The inside of the caisson box leaks water, and finally the water in the caisson box is discharged, and the steel bars are assembled and applied as the bottom concrete.
The foregoing tension member 44 is further implemented by a metal cylinder, which may further have a structure in which a screw and a nut are combined; or, as shown in FIG. 7, the tension member 44 is implemented in a bamboo structure, which includes a a protruding portion 441, a concave portion 442 and a set of connecting portions 443. The protruding portion 441 is disposed at one end of the tensioning member 44. The concave portion 442 is disposed at the other end of the tensile member 44. The concave portion 442 The engaging portion 441 of the other tensioning member (not shown) is engaged, and the sleeve portion 443 is disposed between the protruding portion 441 and the concave portion 442, the protruding portion 441 and the concave portion The 442 series has corresponding threads.
In addition to the foregoing aspect of the hollow jack 42, the present invention can be implemented in another aspect, such as the jack structure 42a of another aspect shown in Figs. 8 and 9, which includes a first base 421a. And a second base 422a, a first clamp 451a electrically driven and at least one drive unit 48a driven by the hydraulic pressure, wherein the first base 421a has a through hole 471a, the second base The 422a also has a through hole 472a for accommodating the tension member 44. The through hole 471a of the first base 421a and the through hole 472a of the second base 422 are disposed corresponding to each other, and the first clamp 451a is fixedly pressed into the caisson. The tensioning member 44 is used in the method. The first clamp 451a is disposed in the through hole 472a of the second base 422a. Further, the second base 422a further includes two hanging members 49a for attaching and detaching the implement. The jack structure 42a of the aspect to the desired position;
As described above, the hollow jack 42a is implemented by providing four driving units 48a, that is, four hydraulic jacks, and the driving units 48a respectively include an outer cylinder 481a and an inner cylinder 482a, and the outer cylinders The body 481a is respectively disposed on the first base 421a. The inner cylinder 482a is disposed in the outer cylinder 481a and connected to the second base 422a. Further, the driving units 48a are respectively arranged on the second base. An accommodating space 5 for accommodating the tension member 44 is formed between the driving units 48a. The jack structure 42a further includes a second clamp (not shown) electrically driven. The first clamp 451a is required to be fixedly pressed into the tension member 44 of the caisson method, and the second clamp is disposed in the through hole 471a of the first base 421a, whereby the hollow jack 42a of the present invention can be applied to the pressing step. 3.
Therefore, when the adjacent construction has doubts about the surrounding site, the construction occupied area is insufficient, the accurate vertical level precision is required, and the soft ground plate has no proper method, the pressing jacking method of the application jack structure of the present invention can be used to achieve high precision. construction.
However, the foregoing embodiments are intended to enable those skilled in the art to understand the present invention and are not intended to limit the scope of the present invention; therefore, the shapes, structures, and features described in the application scope of the present invention are Equivalent variations or modifications are intended to be included within the scope of the invention.

Domestic registration information [please note according to the registration authority, date, number order]

Foreign deposit information [please note according to the country, organization, date, number order]

1‧‧‧Prefade steps

2‧‧‧Building steps

3‧‧‧Pushing step

Claims (9)

[Item 1] A press-in caisson method for applying a jack structure, comprising a prefabrication step, a construction step and a pressing step, the prefabrication step comprising: laying a ground anchor for reaction force and pouring concrete to perform a drawing test, and then setting a step And the metal cutting edge, the constructing step comprises constructing the construction frame, the steel bar, the template group and pouring the concrete, and demolishing the mold after the completion of the maintenance, wherein the pressing step comprises: setting a pressing device and excavating the internal soil sand, the pressing The inlet device comprises a hollow jack connected with the anti-force truss, a caisson connected with the reaction truss, a plurality of tension members extending through the hollow jack and extending downward, and the hollow jack is connected with the ground anchor to form a reaction force , the hollow jack pushes the caisson to sink, and then excavates the internal sand and discharges again, first loosens the second clamp and hydraulically drives the second cylinder, and then clamps the other part of the tension member with the second clamp. After releasing the first clamp and hydraulically driving the first cylinder body, the other clamp is clamped with the first clamp to another section of the tension member, and the hollow jack is pushed to sink the caisson again. And repeat this step that the actuating caisson pressed until a predetermined depth. [Item 2] For example, the press-in caulking method of applying the jack structure of the first application of the patent scope includes a finishing step, which comprises the step of removing the bottom mud and pouring concrete into the water bottom plate. [Item 3] The method of applying the jacking structure of the jack structure according to the first aspect of the patent application, wherein the hollow jack comprises an outer cylinder body and an inner cylinder body disposed in the outer cylinder body, the outer cylinder body having a first clamp, The inner cylinder has a second clamp. [Item 4] The press-in caulking method of the application jack structure of claim 1, wherein the jack structure comprises a first base, a second base and at least one driving unit hydraulically driven, the first base And the second base has a through hole, the through hole of the first base and the through hole of the second base are corresponding to each other, and the driving units respectively comprise an outer cylinder and an inner cylinder, and the outer cylinders The cylinders are respectively disposed on the first base, and the inner cylinder is disposed in the outer cylinder and connected to the second base. [Item 5] The press-in caulking method for applying the jack structure according to the fourth aspect of the patent application, further comprising: a first jig electrically driven, the first jig for fixing a tensioning member pressed into the caisson method, the first jig setting In the through hole of the second base. [Item 6] The press-in caulking method of applying the jack structure according to the fourth or fifth aspect of the patent application, further comprising a second clamp electrically driven, the second clamp for fixing the tensioning element pressed into the caisson method, the second The fixture is disposed in the through hole of the first base. [Item 7] For example, the press-in caulking method of applying the jack structure according to the first aspect of the patent application, wherein the tension member is a bamboo joint structure. [Item 8] The method of applying the jacking structure of the jack structure according to the seventh aspect of the invention, wherein the bamboo joint structure comprises a convex portion, a concave portion and a set of connecting portions, wherein the protruding portion is disposed at one end of the bamboo joint structure, The concave portion is disposed at the other end of the bamboo joint structure, and the concave portion is engaged with the convex portion of the other bamboo joint structure, and the socket portion is disposed between the convex portion and the concave portion. [Item 9] The press-in caulking method of applying the jack structure according to the first aspect of the patent application, wherein the tension member has a thread.