JP2019044473A - Quay wall or revetment structure, and construction method of the same - Google Patents

Abstract

To provide a quay wall or a revetment structure and a construction method of the same which make a precast member lightweight in transportation and construction, make a whole structure rigid, improve an aseismatic performance, is easily constructed, and is economical.SOLUTION: A quay wall or a revetment structure 1 is formed of a plurality of precast PC slabs 4a stacked on a subsoil 2, in which continuous tendons 12 are disposed in at least two holes 6 per one PC slab from the uppermost portion to a predetermined depth in the subsoil 2. The tendon 12 disposed in the subsoil is formed of an anchor fixing portion 3 and a PC connection portion 5, and a lower end of the tendon 12 is fixed in the subsoil 2 via the PC connection portion 5 by cured grout 13 filled in the anchor fixing portion 3. Prestress is applied to the PC slabs 4 tensely fixed and stacked on the subsoil 2 at the uppermost portion of the PC slab 4, the PC slabs are integrated with each other by PC press-bonding, and perforated PC slabs 4a are used, to make members lightweight in transportation and construction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a quay or revetment structure and a construction method thereof regardless of whether the existing quay or revetment is modified or newly installed.

  As this type of existing quay or revetment structure, the revetment and quay constructed using steel sheet piles and steel pipe sheet piles are easy to construct and have a merit that a highly rigid wall surface can be created in the constriction, etc. Prior art is known. A concrete revetment wall constructed by stacking heavy concrete blocks along the slope is also known as a prior art.

  The first prior art using this steel sheet pile is an earthquake-resistant quay wall structure provided for seismic reinforcement of a quay wall, and is connected to an existing quay wall and a steel sheet pile wall extending in an intersecting direction intersecting the existing quay wall. A connecting member extending in the intersecting direction, and the steel sheet pile wall is provided by integrating all or a part of the heads of the plurality of steel sheet piles, and the extending length extending in the intersecting direction is It is an earthquake-resistant quay wall structure characterized by being at least half the length of the steel sheet pile in the axial direction (Patent Document 1).

  And in the state which integrated all or some heads of a plurality of steel sheet piles, the steel sheet pile wall extended in the crossing direction with an existing quay wall is provided, and it is large exceeding the simple total rigidity of a plurality of steel sheet piles. It is possible to exert a secondary moment of section.

  In addition, the second prior art using a heavy concrete block integrally has a fixing anchor portion embedded in the embankment embankment on the back surface of a rectangular block main body, and the surface side of the block main body. A plurality of vertical projecting ribs are provided on the projecting rib, and a concrete block for revetment is integrally formed on the projecting side end portion of the projecting rib. A concrete revetment wall is constructed by arranging a large number of protruding ribs arranged in an up and down arrangement, embedding the protruding ribs on the surface of the concrete revetment wall, and laying a surface embankment of a certain thickness on the surface, It is a greening revetment formed by vegetation on the embankment (Patent Document 2).

  According to this greening revetment, the slope of the embankment embankment is completely covered by a plate-shaped revetment wall made of concrete blocks, the river is flooded by heavy rain, and does not collapse even if the slope is washed. The surface embankment is integrated with the vegetation and is fitted in the dovetail groove, so that it is not easily washed away and the greening is maintained.

JP 2017-82454 A JP-A-6-248627

  However, in the first prior art, the revetment and quay constructed using steel sheet piles and steel pipe sheet piles are in contact with seawater regardless of the mode of use. As aging progresses, it will eventually become insufficient in structural strength and will need to be updated regularly. Renewal causes not only the problem that the construction becomes large and requires enormous costs, but also the problem that the port facility cannot be used during the construction period.

  In the second prior art, the revetment wall constructed using a heavy concrete block is a structure that supports the earth pressure by the weight of the concrete block, and the weight of the concrete block is large. Sometimes large transport carts and lifting equipment are required, which is expensive. In addition, as shown in Patent Document 2, it is common to use a steel bar (rebar) between the blocks, and a foundation is required to fix the lower end of the steel bar (rebar). Costs and construction work are required. Furthermore, the revetment wall structure in which the blocks are connected and integrated with steel bars (rebars) is weak at the connecting part, and when the earthquake occurs, the seam opens and the relative displacement occurs between the blocks, and the whole revetment wall is inclined. There have been reports of earthquake damages that made it unusable.

  Therefore, in the present invention, in order to solve the above-described problems, the weight of the precast member is reduced during transportation and construction, the entire structure is strengthened, the seismic performance is improved, and the construction is simple and economical quay or revetment. An object is to provide a structure and a method for constructing the structure.

  As a specific means for achieving the above object, the first invention according to the present invention is a quay or revetment structure formed by stacking a plurality of precast PC plates on the ground, and includes a cross section of the PC plate. A plurality of holes are formed, and a tension material continuous in at least two holes per PC plate penetrates from the top to the bottom and is arranged to a predetermined depth of the ground, and the tension material arranged in the ground is The lower end of the tension member is fixed in the ground by hardening of the grout filled in the anchor fixing portion via the PC connection portion, and the uppermost end of the tension member. A quay or revetment structure is characterized in that pre-stress is applied to the PC plate that is tension-fixed at the top of the PC plate and stacked on the ground, and the PC plates are joined together by PC pressure bonding. Offer It is intended to.

  In the first invention, in the horizontal direction of the stacked PC plates (the wall wall extending direction), a plurality of tension members for lateral fastening are provided at predetermined intervals in the vertical direction of the PC plate. By placing and fixing the tension material for lateral fastening, the PC plate is prestressed and the adjacent PC plates are integrated; the PC plate is provided with vertical ribs; The continuous tension material is penetrated through the longitudinal rib from the uppermost part of the PC plate over the entire length to a predetermined depth of the ground; and from the upper part of the PC plate stacked on the ground through the longitudinal rib. As an additional requirement, it is necessary to place the diagonal cable to a predetermined depth in the ground and fix the tension.

  A second invention according to the present invention is a method for constructing a quay or revetment by stacking a plurality of precast PC plates on the ground, wherein a predetermined depth is inserted at a position where a tension material scheduled for the ground is inserted. A tension material insertion hole is formed by drilling to the top, and a perforated PC plate having a plurality of holes is stacked and arranged thereon, and a fixing portion for fixing device installation is provided at the top, and a bottom portion of the fixing portion. A fixing PC plate provided with a sheath in accordance with the position of the hole of the PC plate from the bottom to the bottom is disposed, and a PC cable made of a plurality of PC steel wires as the tension material is continuous without providing an intermediate connector. Insert the fixing tool from the top of the fixing PC plate to the bottom of the tension material insertion hole drilled in the ground, and attach the fixing tool to the fixing part to temporarily fix it. From the bottom of the tension material insertion hole Fill and grout the grout to the specified height and harden the anchor After forming the landing portion and fixing the lower end of the tendon material in the ground via the upper PC connecting portion, the upper end of the tendon material is tension-fixed at the fixing portion, and the stacked PCs The present invention provides a method for constructing a quay or revetment characterized in that pre-stress is applied to the plates, and the PC plates and the uppermost fixing PC plate are bonded together by pressure bonding.

According to the quay or revetment structure and the construction method thereof according to the present invention, excellent effects as described below are exhibited.
1. By using a perforated PC plate, it is possible to reduce the weight of the member during transportation or erection, eliminating the need for large construction equipment and reducing costs.
2. By using the holes of the PC plate, it is possible to eliminate the need for a conventional insertion hole or sheath dedicated to a tension material. Further, without using any intermediate joint coupler or the like, a continuous tension material can be arranged from the uppermost part to a predetermined depth of the ground, which is easy to work and economically excellent.
3. The tension material placed in the ground is fixed in the ground by hardening the grout filled in the anchor fixing part via the PC connection part, and the tension material that is built up on the ground with the PC plate built up is fixed in tension. By doing so, the whole is integrated, and it is not necessary to provide a concrete foundation or a pile foundation at the base of a concrete block as in the prior art, and it is possible to save labor and reduce costs. In addition, prestress is applied to the PC plate main body, and the PC plates are pressure-bonded to each other to form a strong earthquake-resistant structure, which is much stronger than the conventional reinforcing bar joint structure.
4). By placing the tension material for horizontal fastening in the horizontal direction of the PC plate (the quay wall surface extension direction) and fixing the tension, the PC plates arranged side by side are the same as the vertical direction (the wall wall wall height direction). Prestress is applied, and adjacent PC plates are joined together by pressure bonding to form a strong earthquake-resistant structure. As a result, the entire wall is prestressed in two vertical and horizontal directions. It becomes a PC pressure bonding structure in both directions, and a structure having excellent seismic performance.
5. By providing vertical ribs on the perforated PC plate and arranging the tension material to fix the tension, the thickness of the PC plate body can be reduced, so that the weight can be reduced and the economy can be improved.
6). If the height of the quay and revetment is relatively high, by placing diagonal cable,
Stable structural performance can be obtained without increasing the thickness of the perforated PC plate, the tension material, etc., and more economical.
7). In addition, when prestressed pre-stress is applied to a perforated PC plate, it can prevent cracking and damage of the PC plate during transportation and installation, the wall body also becomes stronger, and installation There is an effect that can reduce the tension material to be inserted after.
8). By using the concrete PC plate, the steel sheet pile is not corroded and needs to be renewed, so that the durability is improved and the running cost is greatly reduced.

It is a longitudinal cross-sectional view of only the principal part which showed schematically the quay or the bank protection structure which concerns on 1st Embodiment in 1st invention of this invention. It is a cross-sectional view of only the principal part which showed schematically the quay or revetment structure concerning the embodiment. It is an expanded sectional view showing an example of the preferred tension material (PC cable) used for the quay or revetment structure concerning the embodiment. It is a schematic sectional drawing of an example which shows the structure of the tension material for longitudinal fastening (PC cable) used for the quay or revetment structure concerning the embodiment. It is sectional drawing which shows the structure of the tension material (single unbonded PC steel wire) for the vertical fastening of another example used for the quay or the revetment structure which concerns on the same embodiment, or a horizontal fastening. It is sectional drawing which shows the structure of the anchor fixing | fixed part at the time of using the tension material for vertical fastening (single unbonded PC steel strand) of the other example used for the quay or the revetment structure concerning the embodiment. It is a longitudinal cross-sectional view of only the principal part which showed schematically the quay or the bank protection structure which concerns on 2nd Embodiment in 1st invention of this invention. It is a cross-sectional view of only the principal part which showed schematically the quay or revetment structure concerning the embodiment. It is a longitudinal cross-sectional view of only the principal part which showed schematically the quay or the bank protection structure which concerns on 3rd Embodiment in 1st invention of this invention. It is a cross-sectional view of only the principal part which showed schematically the quay or revetment structure concerning the embodiment. It is explanatory drawing which showed the 1st process of the method of constructing the quay or the bank protection structure which concerns on 1st Embodiment in 2nd invention of this invention with the schematic cross section. It is explanatory drawing which showed the 2nd process which concerns on the embodiment with the schematic cross section. It is explanatory drawing which showed the 3rd process which concerns on the embodiment with the schematic cross section. It is explanatory drawing which showed the 4th process which concerns on the embodiment with the schematic cross section. It is explanatory drawing which showed the 5th process which concerns on the embodiment with the schematic cross section. It is explanatory drawing which showed the 6th process which concerns on the embodiment with the schematic cross section. It is explanatory drawing which showed the 4th process of the method of constructing the quay wall or the bank protection structure which concerns on 2nd Embodiment in 2nd invention of this invention with the schematic cross section. It is explanatory drawing which showed the 5th process which concerns on the embodiment with the schematic cross section. It is explanatory drawing which showed the 6th process which concerns on the embodiment with the schematic cross section.

  The present invention will be described in detail based on the illustrated embodiment. First, the quay or revetment structure and its construction method will be described with reference to FIGS. 1 and 2 showing specific embodiments. The quay or revetment structure 1 generally includes an anchor fixing portion 3 provided on the ground 2 on the seabed. A PC wall portion 4 which is installed adjacent to the ground wall 2 in the extending direction of the wall of the quay or revetment and is piled upward, and the piled PC wall portion 4 is connected to the anchor fixing portion 3. It is comprised from the PC connection part 5 fixed to the said ground 2. FIG.

  As shown in FIG. 2, the PC wall 4 is formed by placing a precast concrete plate 4a (hereinafter referred to as a perforated PC plate) having a plurality of holes 6 on the ground 2 in the horizontal direction (the wall wall extension direction of the quay or revetment = horizontal). Is installed adjacent to each other, and stacked or stacked (stacked) in the height direction (vertical direction) on the top of each perforated PC plate 4a, and the fixing PC plate 4b is installed at the top. Is built. The fixing PC plate 4b has a notch-shaped fixing portion 4c for setting a fixing tool, and a sheath 7 is arranged below the fixing portion 4c in accordance with the hole position of the perforated PC plate 4a. However, the fixing PC plate 4b and the uppermost perforated PC plate 4a may be integrated in advance.

  The ground 2 is preliminarily arranged in accordance with the positions of the holes 6 (all in the illustrated example) where the tension members 12 are to be disposed among the plurality of holes 6 of the perforated PC plate 4a to be constructed. A tension material insertion hole 8 is formed by drilling to a predetermined depth. In the tension material insertion hole 8, the anchor fixing portion 3 is used from the solid ground 2 to the required length (depth), and there is no fixing function from the lower end of the PC wall portion 4 installed on the ground 2. The PC connection part 5 is defined as the ground 2b through the ground 2a. In addition, when there is no soft ground 2a on the surface of the ground 2, the PC connection part 5 does not need to be provided substantially.

  Further, as shown in the above embodiment, the soft ground 2a is dug down to a predetermined depth from the surface of the ground 2 to form a concave portion 9 having a required width parallel to the sea surface, and a non-shrink mortar base is formed in the central portion of the concave portion 9 It is desirable that the base mound 11 is formed by refilling with gravel, crushed stone, etc. after the perforated PC plate 4a is formed, but if there is no soft ground 2a on the upper surface of the ground 2, 9 and the base mound 11 need not be provided. In that case, the non-shrinkable mortar base 10 is formed directly on the surface of the ground 2, and the top surface of the mortar base 10 is substantially horizontal even if there is a slight difference in thickness corresponding to the unevenness of the ground. And a perforated PC plate 4a is placed thereon.

  Further, in the embodiment shown in FIG. 2, at least two or more five holes are provided per one perforated PC plate 4 a, and the tension material 12 is inserted into all the holes, and the tension material provided in the ground 2. The number of holes in the insertion hole 8 should be two or more and should be five at a time. However, the number of holes is not limited to this, and the number of holes may be determined according to the number of required tension members. For example, even if the perforated PC plate 4a has five holes per sheet, if the number of the tension members 12 to be inserted is three, the number of the tension material insertion holes 8 to be drilled in the ground 2 is three. can do. That is, the number of holes in the ground 2 and the number of holes in the upper perforated PC plate 4a do not always match and may be different.

  After the anchor fixing portion 3 (including the tension material insertion hole 8), the PC connecting portion 5 and the PC wall portion 4 are formed, the vertical fastening cable as the tension material 12 is extended from the top of the PC wall portion 4 to the entire length. Is inserted through the PC connecting portion 5 to the bottom of the tension material insertion hole 8 in the anchor fixing portion 3 and is placed in the gap between the vertical fastening cable and the tension material insertion hole 8. Thus, the anchor fixing portion 3 can be easily formed as a fixed end of the vertical fastening cable without using a conventional cable fixing tool. Thereafter, by using the required fixing tool 14 to fix the vertical fastening cable to the fixing portion 4c provided on the uppermost portion of the PC wall portion 4, a prestress is applied to the perforated PC plate 4a. Then, grout is filled in the holes 6 of each PC wall portion 4 and cured, and the PC wall portions 4 in which the upper and lower PC plates 4a are integrally bonded to each other at the bonding surface 15 are formed. Therefore, the PC wall part 4 becomes the quay or revetment wall structure 1 firmly fixed to the ground 2 by the anchor fixing part 3 through the PC connecting part 5.

The tendon material 12 shown in the above-described embodiment shows a state in which the tendon material is arranged as a result of synthesizing a plurality of tendon materials, and conceptually explains the present invention. It does not indicate the situation.
In addition, when the perforated PC plate 4a constituting the PC wall portion 4 is manufactured at the factory, it is preferable that a plurality of primary cables 16 are arranged in advance on the PC plate 4a to fix the tension and individually apply prestress. The primary cable 16 is preferably tension-fixed by a pre-tension method, but may be a post-tension method.
In addition, it is preferable to carry out the rust prevention process with respect to the tension material 12 by filling grout in the hole 6 for drilling the tension material and the hole 6 of the PC plate 4a.

Further, in the horizontal direction (the wall wall extension direction of the quay or revetment = lateral direction), the PC plate 4a is installed and constructed in the adjacent state as described above to form the PC wall portion. A plurality of sheaths (not shown) are arranged in the horizontal direction, and a transverse fastening cable 17 as a tension material is inserted into the sheath, and the connected tension is fixed at regular intervals (for example, 20 to 30 m). The adjacent PC plates 4a are integrated to form a quay or revetment wall.
1 and 2 illustrate the concept of the present invention, and do not indicate the actual specific arrangement, quantity, sheath size, or the like.
After that, as usual, the backside stone 18 and the backfill 19 are backfilled on the back of the formed quay or revetment structure 1, and the pavement concrete 20 is placed on the top to form a pier or a bay facility.

The tendon members 12 and 17 used in the embodiment are PC cables formed by bundling a plurality of PC steel wires 36.
That is, the PC steel strand 36 used is a PC steel strand of Patent No. 2691113 owned by the applicant, as shown in FIG. 3, from a coated PC steel on which an epoxy resin coating film 21 is formed. It is preferable to use a wire 36 in which side wires 23 are more closely aligned around the core wire 22 (seven strands, registered trademark name: SC strand).

For example, as the tension member 12 used as the longitudinal fastening cable, as shown in FIG. 4, the PC cable made of three SC strands is formed from the seven coated PC steel strands 36 (SC strands), and the hole 6 Alternatively, the grout 13 is filled between the PC cable and the hole 6 or the sheath.
In addition, when the tension material 12 uses the wire 36 made of coated PC steel, the grout is not filled between the hole 6 or the sheath and the tension material 12 except for the anchor fixing portion 3 and can be in an unbonded state. This eliminates the field work of grout filling.

Further, as shown in FIG. 5, a single PC is formed by coating a PE (polyethylene) coating 24 around the outer circumference of a coated PC steel wire 36 in a cylindrical shape and filling a gap with a rust preventive 25 such as grease or wax. Unbonded PC steel strands can be used as the tendon 12. It is also possible to use a strand 36 of PC steel that is not coated on the strand of single unbonded PC steel.
For example, when a PC cable formed of a plurality (three) of single unbonds is used as the tension member 12, the tension member 12 disposed in the anchor fixing portion 3 is PE-coated as shown in FIG. 24 is cut out to expose the wire 36 from the painted (or unpainted) PC steel. In this way, by removing the PE coating 24 in the anchor fixing portion 3 in advance, after inserting the tension material 12 into the tension material insertion hole 8, the grout 13 from the anchor fixing portion 3 to the top of the PC wall portion 4 is obtained. When the grout is hardened, the anchor fixing portion 3 becomes the lower fixing portion, and then the tension member 12 can be tension-fixed, and only one grout filling operation is required. Therefore, as compared with the case where the wire 36 is used from the coated PC steel without the PE coating 24, the grout filling work need not be divided into two times and can be performed only once, so that the labor can be saved.

  In addition, as the tension member 17 used as the lateral fastening cable, the same tension as that used for the vertical fastening cable is required to join the PC wall part 4 installed upright from the ground by pressure bonding and to integrate them. It will be fixed by force. For example, the coated PC steel wire 36 shown in FIG. 3 is used, or a conventional non-painted PC steel wire 36 is used at a plurality of positions (in the illustrated example, on the inside of the outer surface). 3 and 3 on the inner side of the surface), and detailed description is omitted.

Next, a second embodiment according to the present invention will be described with reference to FIGS. The main body portion of the perforated PC plate constituting the PC wall portion according to the second embodiment is substantially the same as the perforated PC plate 4a according to the first embodiment. Since the only difference is that a pair of vertical ribs are provided on one side surface, the same parts are denoted by the same reference numerals, and detailed description thereof is omitted.
A pair of chevron-shaped vertical ribs 26 are integrally formed near the left and right ends of one side surface of the perforated PC plate 4a according to the second embodiment, and the vertical ribs 26 are vertically formed at the center of the vertical ribs 26. A sheath 28 is provided through which a reinforcing vertical fastening cable 27, which is an auxiliary or reinforcing tension material, is inserted.

  Also in the second embodiment, similarly to the first embodiment, the PC wall 4 is constructed by stacking the perforated PC plates 4a on the ground 2, and in this case, the PC plate 4a In accordance with the positions of the hole 6 and the sheath 28, a tension material insertion hole 8 and a reinforcement tension material insertion hole 8a having a required depth are provided to form the anchor fixing portion 3 and the anchor connection portion 5, and A non-shrinkable mortar base 10 is formed in a recess 9 provided in the ground 2, and perforated PC plates 4 are sequentially stacked thereon, and a fixing PC plate 4 b with vertical ribs 26 is installed on the uppermost portion so that the PC wall 4 is The tension members 12 and 27 are constructed from the uppermost portion of the PC wall portion 4 through the PC connecting portion 5 and inserted to the bottom of the tension material insertion holes 8 and 8a in the anchor fixing portion 3, and are arranged. The grouts 13 and 13a are filled in the material insertion holes 8 and 8a. After the Uto is cured, the tension members 12 (longitudinal tightening cable) and 27 (longitudinal tightening reinforcing cable) are tensioned and fixed by the fixing tool 14 at the fixing portion 4c of the fixing PC plate 4b with the vertical rib 26, respectively. A wall structure 1 is formed.

  Thus, by using the perforated PC plate 4a having the vertical ribs 26, the thickness of the main body portion of the PC plate 4a can be reduced and the weight can be reduced. By inserting the vertical tightening reinforcing cable 27 into the inside and fixing the tension, the quay wall or revetment wall structure 1 is further strengthened.

Further, a third embodiment shown in FIGS. 9 and 10 will be described.
The diagonal cable 29 is installed (suspended) on the PC wall portion 4 according to the second embodiment, and the construction other than the installation structure of the diagonal cable 29 is the same as that of the second embodiment. It is almost the same. In order to explain the concept of the present invention, the installation structure of the diagonal cable 29 shown in the figure shows a preferable mode and does not have a configuration limited thereto.
The diagonal cable 29 is, for example, a single unbonded PC steel wire 12 having the PE coating 24 shown in FIG. 5 and is formed by bundling a plurality of single unbonds. The PC steel strand 36 used for single unbonding is preferably a coated PC steel strand 36 (SC strand) on which the anticorrosive resin coating film 21 is formed, but also as a steel wire subjected to other antirust treatments. Good.

  In order to install the diagonal cable 29 on the PC wall 4, it is necessary to slightly change the shape or configuration of the perforated PC plate 4 a having the vertical ribs 26. That is, as shown in FIG. 10, the configuration of the vertical ribs 26 requires a sheath 28 that extends in the lateral direction (about two pieces) and is widened, and through which the reinforcing vertical fastening cable 27 that is a tension material is inserted. Two are arranged at intervals of. In addition, since the number of reinforcing vertical fastening cables 27 is increased, one tension member 12 (longitudinal fastening cable) at the center provided in the main body of the perforated PC plate 4a can be reduced. And in the perforated PC plate 4a located at the uppermost part of the PC wall portion 4, a sheath 30 inserted through the upper end portion of the diagonal cable 29 has a central portion of each vertical rib 26, that is, a reinforcing vertical fastening cable 27. A fixing portion 31 is formed on the front side (sea side) of the perforated PC plate 4a.

  As for the installation of the diagonal cable 29, as described in the second embodiment, after the perforated PC plate 4a on the quay or revetment wall is stacked and fixed as a whole, the angle of the diagonal cable 29 is previously set. The arrangement situation is calculated, the tension material insertion hole 32 is drilled to a predetermined depth in the ground 2, and the diagonal cable 29 is inserted into the sheath 30 previously arranged in the perforated PC plate 4a of the PC wall portion 4, The lower end portion of the diagonal cable 29 is inserted to the bottom of the drilled tension material insertion hole 32, and a grout 33 is filled between the tension material insertion hole 32 and the diagonal cable 29 to be hardened. After the fixing portion 3 is formed, the diagonal cable 29 is tension-fixed by the fixing tool 34 in the fixing portion 31. Further, a protective tube 35 is disposed on the outer periphery of the diagonal cable 29 between the vertical rib 6 surface of the PC wall 4 and the surface of the ground 2. As the protective tube 35, for example, a high-density polyethylene tube ( HDPE) or steel pipes can be used. In any fixing portion, the tension material or the cable is tension-fixed by the fixing tool and then is completely filled with the grout.

Next, an embodiment according to the second aspect of the present invention, that is, a method for constructing a quay or revetment structure using the perforated PC plate 4a as described in the embodiment of the construction structure is shown in FIG. A first construction method (embodiment) shown in FIG. 16 will be described.
First, as shown in FIG. 11, the first step is along the length direction (depth direction in the drawing) of the quay or revetment structure 1 with respect to the seabed ground 2 where the quay or revetment structure 1 is to be constructed. Thus, a straight recess 9 is formed by digging from the surface of the ground 2 to a predetermined depth with a required width, and a mortar base 10 having a required thickness by a non-shrink mortar is formed in the center of the recess 9 along the length direction. The upper surface of the mortar base 10 is formed substantially parallel (horizontally) to the sea surface.

  In accordance with the positions of the plurality of holes 6 of the perforated PC plate 4a constructed by stacking on the mortar base 10, the mortar base 10 is penetrated and drilled to a predetermined depth of the ground 2 as the anchor fixing portion 3. A tendon insertion hole 8 is formed. In the tension material insertion hole 8, the anchor fixing portion 3 is used from the solid ground 2 b to the required length (depth), and from the lower side of the concave portion 9 formed in the ground 2 through the soft ground 2 a having no fixing function. The PC connecting portion 5 is defined as reaching the solid ground 2b.

As the second step, as shown in FIG. 12, a perforated PC plate 4a having a plurality of holes is formed on the mortar base 10 in accordance with the position of the drilled tension material insertion hole 8, on the quay or revetment. The first stage is installed adjacent to each other in the length direction of the structure.
Note that, as described in the first to third embodiments, when the soft ground 2a is not present on the surface of the ground 2, the PC connecting portion 5 may not be provided substantially. After installing the perforated PC plate 4a, it is desirable that the base mound 11 is formed by refilling the concave portion 9 with gravel, crushed stone, or the like, but when the soft ground 2a is not on the upper surface of the ground 2, the concave portion 9 and The base mound 11 may not be provided. In that case, it is preferable to form the non-shrinkable mortar base 10 directly on the surface of the ground 2 and install the perforated PC plate 4a thereon.

  As the third step, as shown in FIG. 13, on the first-stage perforated PC plate 4a, the second-stage to third-stage, and the fourth-stage perforated PC plate are sequentially aligned with the positions of the holes. 4a is stacked and installed, and the fixing PC plate 4b is installed at the top. The fixing PC plate 4b is provided with a notch-shaped fixing portion 4c for setting a fixing tool. The sheath 7 is aligned with the hole position of the perforated PC plate 4a stacked from the bottom to the lower end of the fixing portion 4c. Is arranged.

  As the fourth step, as shown in FIG. 14, for example, the PC cable 12 made of a plurality of PC steel stranded wires 36 shown in FIG. 4 is used as the tension material. Use continuous ones without providing them. Then, the PC cable 12 is inserted from the uppermost fixing PC plate 4b to the bottom of the tension material insertion hole 8 of the solid ground 2b which has been drilled, and the fixing tool 14 is attached to the fixing portion 4c and temporarily fixed. In this state, the grout 13 is filled from the top to the height of the solid ground 2b from the bottom of the tension material insertion hole 8 of the drilling hole, and the filled grout 13 is hardened to fix the anchor as the fixed end of the PC cable 12. The part 3 is formed, and the lower end of the PC cable 12 is fixed to the ground 2b through the PC connecting part 5 on the upper part.

  As the fifth step, as shown in FIG. 15, the PC cable 12 is tension-fixed by the fixing device 14 at the fixing portion 4c in the uppermost fixing PC plate 4b, and the stacked perforated PC plate 4a and the fixing PC plate 4a are fixed. The PC plate 4b is bonded and integrated with the PC plate 4b, and is formed integrally with the anchor fixing unit 3 via the PC connecting unit 5 to form a temporary PC wall unit 4.

As the sixth step, as shown in FIG. 16, thereafter, the grout 13 is filled from the top into the holes of the PC connecting portion 5 and the PC wall portion 4, and the concave portion 9 is backfilled with gravel, crushed stone, etc. 11 and the land side of the PC wall part 4 is subjected to gravel, crushed stone, backfill sand, pavement concrete, etc. to form a quay or revetment structure 1.
Although not shown in the horizontal direction (the wall wall extending direction), the adjacent perforated PC plate 4a is constructed by the same procedure as described above, and finally the lateral fastening cable is inserted to fix the tension and adjoin. The perforated PC plate 4a is integrated to form a stronger quay or revetment.

Furthermore, about the 2nd construction method which constructs the quay or the revetment structure 1 using the unbonded strand (PC steel strand) shown in FIG. This will be described with reference to FIG. Since the first process to the third process in the first construction method described above are the same, illustration and description are omitted.
After the first to third steps are completed, that is, a tension material insertion hole 8 is formed in the recess 9 of the ground 2, and a plurality of perforated PC plates 4a are stacked on the mortar base 10, and the fixing PC plate is placed on the top. After installing 4b, the fourth step is performed.

  In the fourth step, as shown in FIG. 17, a single unbonded PC steel strand is used as a tension member (PC cable) 12. Then, as shown in FIG. 6, the tension member (PC cable) 12 disposed in the anchor fixing portion 3 cuts the PE coating and exposes the strand 36 of PC steel. Also in this case, the tension material (PC cable) 12 is a continuous material without providing an intermediate connector. A tension material (PC cable) 12 is inserted from the uppermost fixing PC plate 4b to the bottom of the tension material insertion hole 8 of the drilling hole, and temporarily fixed by the fixing device 14 at the fixing portion 4c.

  In the fifth step, as shown in FIG. 18, after inserting the tension material (PC cable) 12, the grant 13 is filled from the anchor fixing portion 3 to the uppermost portion of the PC wall portion 4, and the grout 13 is cured. Thus, the anchor fixing portion 3 is formed, and the grout filling of the PC connecting portion 5 and the PC wall portion 4 is completed. Compared to the case of using the strand 36 of PC steel without PE coating, the filling process (construction) of the grant 13 does not need to be divided into two times and can be performed only once, so that labor can be saved.

In the sixth step, as shown in FIG. 19, the tension material (PC cable) 12 is tension-fixed by the fixing tool 14 at the fixing portion 4c of the uppermost fixing PC plate 4b, and the holes are stacked. The perforated PC plate 4 a and the fixing PC plate 4 b are integrated by pressure bonding, and are integrally formed with the anchor fixing unit 3 via the PC connecting unit 5 to form the PC wall unit 4.
The quay or revetment structure 1 according to the second embodiment and the third embodiment can be constructed in the same manner as the first construction method embodiment, and therefore illustration and description thereof are omitted. .

  The quay or revetment structure and its construction method according to the present invention are generally a quay or revetment structure formed by stacking a plurality of precast PC plates 4a on the ground 2, and a plurality of holes are formed in the cross section of the PC plate 4a. 6 is formed, and at least two holes 6 per PC plate are connected to the tension material 12 that is continuous from the uppermost part to the lowermost part and arranged to a predetermined depth of the ground 2, and is disposed in the ground. 12, the lower end side becomes the anchor fixing portion 3 and the upper portion becomes the PC connecting portion 5, and the anchor fixing portion 3 is formed on the lower end side of the tension material 12 by hardening of the filled grout 13, and the anchor fixing portion 3 is connected to the PC. The lower end of the tension member 12 disposed through the hole 6 of the PC plate 4a stacked on the ground 2 via the portion 5 is a fixed end, and the uppermost end of the tension member 12 is at the uppermost portion of the PC plate 4a. Pre-stress is applied to the PC plate 4a that is stretched and fixed and stacked on the ground, and the PC plates are integrated by PC pressure bonding. Can be used to reduce the weight of the material during transportation or erection during transportation or erection, eliminating the need for large construction equipment, reducing costs, and using the holes in the PC plate, There is no need to provide an insertion hole or sheath dedicated to the tendon material, and the continuous tendon material 12 can be arranged from the top to the predetermined depth of the ground 2 without using any intermediate joint coupler. The construction is easy and economically superior, and the PC plates are joined by pressure bonding to form a strong earthquake-resistant structure, which is not only much stronger than the conventional rebar joint structure, but also a conventional concrete block. Con on the base Since it becomes unnecessary to provide a discrete foundation or pile foundation, it can be widely applied or utilized in a wide variety of quay or seawall construction.

DESCRIPTION OF SYMBOLS 1 Quay or revetment structure 2 Ground 2a Soft ground 2b Solid ground 3 Anchor fixing part 4 PC wall part 4a PC plate 4b Fixing PC plate 4c, 31 Fixing part 5 PC connecting part 6 Hole 7, 28, 30 Sheath 8, 8a , 32 Tensile material insertion hole 9 Recessed portion 10 Mortar base 11 Base mound 12, 27 Tensile material (longitudinal tightening cable)
13, 13a, 33 Grout 14, 34 Fixing tool 15 PC crimping interface 16 Primary cable 17 Tension material (lateral cable)
18 Backing stone 19 Backfill sand 20 Pavement concrete 21 Resin coating film 22 Core wire 23 Side wire 24 PE coating (PC steel strand with coating = tension material 12)
25 Anticorrosive filler 26 Vertical rib 29 Diagonal cable 35 Protective tube 36 Painted PC steel strand (or unpainted PC steel strand)

As a specific means for solving the problems of the above-described conventional example, the first invention according to the present invention is a quay wall formed by stacking precast perforated PC plates having a plurality of holes formed in a cross section on the ground. A revetment structure, wherein a tension material continuous to a part of a plurality of holes per one perforated PC plate penetrates from the top to the bottom and is arranged to a predetermined depth of the ground, The tension material disposed on the anchor is formed by an anchor fixing portion located on a solid ground and a PC connection portion located on a soft ground , and the lower end of the tension material is filled into the anchor fixing portion via the PC connection portion. It is fixed in the ground due to the hardening of the grout, and the top end of the tension material is tension-fixed at the fixing portion of the fixing PC plate at the top of the PC plate, and prestress is applied to the PC plate stacked on the ground. And the PC versions There is provided a quay or shore protection structure, characterized in that it is integrated with C compression bonding.

In the first aspect of the present invention, in the horizontal direction of the stacked perforated PC plates (in the direction of the quay wall surface extension), a tension member for lateral fastening is predetermined in the vertical direction of the perforated PC plates over a plurality of plates. multiple arranged at intervals, by stressing anchorage tendons for lateral clamping, the perforated PC version with prestress is applied, it is integrated perforated PC version between adjacent; said hole A vertical rib is provided in the perforated PC plate, and the continuous tension material is penetrated through the entire length from the top of the perforated PC plate to the predetermined depth of the ground; and through the vertical rib. As an additional requirement, an oblique cable is arranged and tension-fixed from the upper part of the perforated PC plate stacked on the ground to a predetermined depth of the ground.

A second invention according to the present invention is a method of building a quay or a revetment by stacking precast perforated PC plates having a plurality of holes formed in a cross section on the ground, the tension planned for the ground A tension material insertion hole is formed by drilling a hole to a predetermined depth at a position where the material is inserted, and a perforated PC plate having a plurality of holes is stacked and arranged on the top, and a fixing portion for installing a fixing tool on the top. And a fixing PC plate provided with a sheath in accordance with the position of the hole, a part of the hole of the perforated PC plate from the bottom to the lower surface of the fixing unit as a tension material insertion hole , Use a PC cable consisting of multiple PC steel strands as a tension material, without using an intermediate connector, and insert it from the uppermost fixing PC plate to the bottom of the tension material insertion hole drilled in the ground. Attach a fixing tool to the fixing unit to temporarily fix it. To form an anchor fixing portion is cured by filling the grout from the bottom of the insertion hole to a position corresponding to the solid ground, the lower end of the tendon through the PC connection section to a position corresponding to the soft ground of the upper After fixing in the ground, the fixing section fixes and tensions the uppermost end of the tension material at the fixing section of the fixing PC plate, and applies prestress to the stacked PC plates, The present invention provides a method for constructing a quay or revetment characterized in that an upper fixing PC plate is integrated by pressure bonding.

As a specific means for solving the problems of the above-mentioned conventional example, the first invention according to the present invention is a perforated PC plate (a product equivalent to JIS A6511) in which a plurality of holes are formed in the cross section on the ground and reduced in weight. Pier or revetment structure formed by stacking a plurality of tension material insertion holes drilled to a required depth in the ground where the perforated PC plates are stacked, and each perforated PC plate A tension material continuous with at least some of the plurality of holes penetrates from the top to the bottom, and the lower end of the tension material is disposed to the bottom of the tension material insertion hole, and is filled in the tension material insertion hole. A fixing PC plate having a sheath and a fixing portion provided with a tension material insertion portion is installed at the top of the stacked perforated PC plate by the hardening of the grout. Upper end penetrates the sheath and fixes Is tensioned fixed by the fixing portion of the PC version, the fixing PC version perforated PC version and the top piled on the ground together with the pre-stress is applied, perforated PC version each other and fixing PC version PC Crimping The present invention provides a quay or revetment structure characterized by being joined and integrated.

In addition, the second invention according to the present invention constructs a quay or revetment formed by stacking a perforated PC plate (JIS A6511 equivalent product) having a plurality of holes formed in a cross section and reduced in weight on the ground. In the method, a plurality of tension material insertion holes drilled to a required depth are provided in the ground where the perforated PC plates are stacked, and the perforated PC plates are stacked and arranged on top of the fixing tool. A fixing PC plate having a fixing portion for installation, and having at least a part of the hole of the perforated PC plate as a tension material insertion hole from the bottom to the lower surface of the fixing portion, and having a sheath in accordance with the position of the hole PC cable made of a plurality of PC steel strands is used as the tension material, and a continuous cable without an intermediate connector is used, and a tension material inserted in the ground from the uppermost fixing PC plate is inserted. Insert it to the bottom of the hole and fix it to the fixing part. Ingredients were the temporarily fixed state by mounting said after the lower end of the tendon grout is filled and cured into insertion hole tendon is fixed to the ground, the top end of the tension member in the fixing unit Penetration through the sheath of the fixing PC plate, tension is fixed at the fixing portion, and prestress is applied to the stacked perforated PC plate and the uppermost fixing PC plate . The present invention provides a method for constructing a quay or revetment characterized by being integrated by pressure bonding.

Claims (5)

A quay or revetment structure formed by stacking multiple precast PC plates on the ground,
A plurality of holes are formed in the cross section of the PC plate, and at least a tension material continuous to two or more holes per one PC plate penetrates from the top to the bottom and is arranged to a predetermined depth of the ground,
The tendon material arranged in the ground is formed by the anchor fixing part and the PC connection part,
The lower end of the tendon is fixed in the ground by hardening of the grout filled in the anchor fixing portion via the PC connecting portion,
The top end of the tension material is tension-fixed at the top of the PC plate and prestress is applied to the PC plate stacked on the ground, and the PC plates are integrated by PC pressure bonding. Quay or revetment structure.   In the horizontal direction (the wall wall extending direction of the quay) of the stacked PC plates, a plurality of tension members for lateral fastening are arranged at a predetermined interval in the vertical direction of the PC plate over the plurality of plates, 2. The quay or revetment structure according to claim 1, wherein prestressing is applied to the PC plate by tension-fixing the tension material, and adjacent PC plates are integrated with each other. The vertical rib is provided in the PC plate, and the continuous tension material penetrates through the entire length from the uppermost part of the PC plate to the predetermined depth of the ground. 2. Wharf or revetment structure described in 2. The berth or revetment structure according to any one of claims 1 to 3, wherein a diagonal cable is arranged and tension-fixed from the upper part of the PC plate stacked on the ground through the vertical ribs to a predetermined depth of the ground. A method of building a quay or revetment by stacking multiple precast PC versions on the ground,
A tension material insertion hole is formed by drilling to a predetermined depth at a position where a planned tension material is to be inserted into the ground, and a perforated PC plate having a plurality of holes is stacked and arranged on the top. A fixing PC plate having a fixing unit for setting a fixing tool, and a fixing PC plate provided with a sheath in accordance with the position of the hole of the PC plate from the bottom to the lower surface of the fixing unit,
PC cables consisting of a plurality of PC steel strands are used as the tendon, and a continuous cable is used without an intermediate connector, and is inserted from the uppermost fixing PC plate to the bottom of the tendon insert hole drilled in the ground. And
A fixing tool is attached to the fixing portion to temporarily fix it, and grout is filled from the bottom of the tension material insertion hole to a predetermined height to be hardened, thereby forming an anchor fixing portion, and via an upper PC connecting portion. After fixing the lower end of the tendon in the ground,
The fixing portion tensions and fixes the uppermost end of the tension material to apply prestress to the stacked PC plates, and the PC plates and the uppermost fixing PC plate are joined by pressure bonding and integrated. A quay or revetment construction method characterized by this.

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