JP2002348898A - Hollow infilling method - Google Patents
Hollow infilling methodInfo
- Publication number
- JP2002348898A JP2002348898A JP2001155629A JP2001155629A JP2002348898A JP 2002348898 A JP2002348898 A JP 2002348898A JP 2001155629 A JP2001155629 A JP 2001155629A JP 2001155629 A JP2001155629 A JP 2001155629A JP 2002348898 A JP2002348898 A JP 2002348898A
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- air
- filling material
- filling
- hollow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば舗装道路等
の下方の地盤中にできた空洞に充填材料を充填するため
の空洞充填工法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cavity filling method for filling a cavity formed in the ground below a pavement road or the like with a filling material.
【０００２】[0002]
【従来の技術】図１０に示すように、舗装道路１２の下
方の地盤１８中に空洞１４ができていて、その空洞１４
に充填材料を充填する場合には、従来は、図１１に示す
ように、その舗装道路１２の舗装厚さ部分を地盤１８か
ら剥がして、空洞１４全体を地上に開放し、その空洞１
４内に砂質土のような充填材料１６を投下して充填し、
その充填材料１６を上から加える力で締め固めた後、図
１２に示すように、充填材料１６の上に舗装道路１２の
舗装厚さ部分を再形成して元通りに修復するような空洞
充填工法があった。2. Description of the Related Art As shown in FIG. 10, a cavity 14 is formed in a ground 18 below a pavement road 12, and the cavity 14 is formed.
Conventionally, as shown in FIG. 11, the pavement thickness portion of the pavement road 12 is peeled off from the ground 18 and the entire cavity 14 is opened to the ground as shown in FIG.
A filling material 16 such as sandy soil is dropped into 4 and filled.
After the filling material 16 is compacted by the force applied from above, as shown in FIG. 12, the cavity filling such that the pavement thickness portion of the pavement road 12 is reformed on the filling material 16 to restore it to its original state. There was a construction method.
【０００３】また他の従来の空洞充填工法としては、図
１３に示すように、空洞１４の一端部に充填材料を投入
する投入口２０を開口し、その投入口２０から空洞１４
内に、セメント等の硬化材を均一に混合した流動性の高
い（後述するフロー値が４００ｍｍ以上の）エアーモル
タル等の充填材料２２を投入して充填し、後で硬化材に
より充填材料２２が固まることにより、その充填材料２
２に、舗装道路１２にかかる力を支持する支持力を持た
せようとする空洞充填工法があった。As another conventional cavity filling method, as shown in FIG. 13, an inlet 20 for charging a filling material is opened at one end of a cavity 14, and the cavity 14 is inserted through the inlet 20.
A filling material 22 such as an air mortar or the like having a high fluidity (having a flow value of 400 mm or more, which will be described later) in which a hardening material such as cement is uniformly mixed is charged and filled therein. By setting, the filling material 2
Second, there is a cavity filling method for providing a supporting force for supporting a force applied to the pavement road 12.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前記従
来の空洞充填工法の前者においては、舗装道路１２の舗
装厚さ部分を地盤１８から剥がしたり、投入した充填材
料１６を締め固めたり、再び舗装道路１２の舗装厚さ部
分を形成する等して修復しなければならないので非常に
手数がかかり、またその工事中はその空洞１４上を車両
が完全に通れなくなる等の問題がある。However, in the former method of the above-mentioned conventional cavity filling method, the pavement thickness portion of the pavement road 12 is peeled from the ground 18, the injected filling material 16 is compacted, or the pavement road is re-filled. Since it must be repaired by forming twelve pavement thickness portions, it is very troublesome, and there is a problem that the vehicle cannot completely pass through the cavity 14 during the work.
【０００５】また前記従来の空洞充填工法の後者におい
ては、上記従来の前者の空洞充填工法のような問題は少
ないが、図１３に示すように、空洞１４の天端部（天井
部）に空気溜り２４ができてしまうので、空洞１４を充
填材料２２により完全に充填することができないため、
舗装道路１２の舗装厚さ部分が陥没するおそれを完全に
無くすことができない。[0005] In the latter case of the conventional cavity filling method, there are few problems as in the former case of the former cavity filling method. However, as shown in FIG. Since the pool 24 is formed, the cavity 14 cannot be completely filled with the filling material 22.
The possibility that the pavement thickness portion of the pavement road 12 collapses cannot be completely eliminated.
【０００６】また充填材料２２は流動性が大きくなるよ
う水分を多く加えて調合されるために組織の粒子間が互
いに離れ、硬化材により固化した充填材料２２が後に劣
化するおそれがあり、固化した充填材料２２の前記支持
力が大きな状態に長期にわたって維持される保証がない
という問題がある。Further, since the filling material 22 is prepared by adding a large amount of water so as to increase the fluidity, the particles of the tissue are separated from each other, and the filling material 22 solidified by the hardening material may be deteriorated later. There is a problem that there is no guarantee that the supporting force of the filling material 22 is maintained in a large state for a long time.
【０００７】そこで本発明は、上記問題点に鑑みて、舗
装道路の舗装厚さ部分等を剥がしたり元通りに修復した
りする等の手数がかからず、空洞を隙間なく完全に充填
することができ、さらに充填材料の支持力が大きな状態
に長期にわたって維持されることを保証することができ
る空洞充填工法を提供することを課題とするものであ
る。[0007] In view of the above problems, the present invention does not require any trouble such as peeling or repairing the pavement thickness portion of the pavement road, and completely fills the cavity without any gap. It is an object of the present invention to provide a cavity filling method capable of ensuring that the supporting force of the filling material is maintained in a large state over a long period of time.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
に、本発明の空洞充填工法は、空洞の一端部に充填材料
を投入する投入口を開口し、空洞の他端部に空洞内の空
気を吸引する吸気口を開口し、前記投入口から硬化材を
添加した流動性の小さい充填材料を投入すると共に空気
を送り込み、これと同時に前記吸気口から空洞内の空気
を外部に吸引して脱気するようにしたことを特徴とする
ものである。In order to solve the above-mentioned problems, a cavity filling method according to the present invention is characterized in that an opening for charging a filling material is opened at one end of a cavity, and a cavity inside the cavity is formed at the other end of the cavity. Open the intake port for sucking air, feed the air with a small flowable filler material added with the curing agent from the input port and send air, at the same time sucking the air in the cavity from the intake port to the outside It is characterized by being deaerated.
【０００９】このような特徴を有する空洞充填工法によ
れば、投入口から硬化材を添加した流動性の小さい充填
材料を投入すると共に空気を送り込み、これと同時に吸
気口から空洞内の空気を外部に吸引して脱気するように
することにより、舗装道路の舗装厚さ部分等を剥がした
り元通りに修復したりする等の手数がかからない。[0009] According to the cavity filling method having such features, a low-fluidity filling material to which a hardening material is added is supplied from the charging port and air is sent, and at the same time, air in the cavity is discharged from the suction port to the outside. In this way, it is not necessary to peel off the pavement thickness portion of the pavement road or to restore it to its original state.
【００１０】またこのような特徴を有する空洞充填工法
によれば、空洞の天端部に空気溜りができるのを防止で
きるので、空洞を充填材料により隙間なく完全に充填す
ることができ、さらに充填材料の流動性が小さく粒子間
が緻密であるため、固化後の充填材料の支持力が大きな
状態に長期にわたって維持されることを保証することが
できる。Further, according to the cavity filling method having such characteristics, it is possible to prevent the formation of air at the top end of the cavity, so that the cavity can be completely filled with the filling material without any gap. Since the fluidity of the material is small and the space between the particles is dense, it is possible to guarantee that the supporting force of the solidified filling material is maintained in a large state for a long time.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施の形態につい
て、図面に基づいて具体的に説明する。図１ないし図４
は、本発明による空洞充填工法の第１の実施の形態につ
いて説明するために参照する図である。Embodiments of the present invention will be specifically described below with reference to the drawings. 1 to 4
FIG. 1 is a diagram referred to for describing a first embodiment of a cavity filling method according to the present invention.
【００１２】本発明の第１の実施の形態に係る空洞充填
工法について、図４に示すフローチャートに基づいて説
明する。まず、地中レーダーを搭載した自走式路面下空
洞探査車を舗装道路１２上に走行させながら、その地中
レーダーにより路面下方にできている空洞を探査する
（図４のステップＳ１）。The cavity filling method according to the first embodiment of the present invention will be described with reference to the flowchart shown in FIG. First, while a self-propelled underground road vehicle equipped with an underground radar is driven on a pavement road 12, a cavity formed below the road surface is searched by the underground radar (step S1 in FIG. 4).
【００１３】そして、図１０に示すような空洞１４を発
見したら、図１に示すように、舗装道路１２の下方の地
盤１８中にできた空洞１４に充填材料２６を充填するた
めに、空洞１４の一端部には、充填材料２６を投入する
ための投入口２０を削孔（開口）すると共に、空洞１４
の他端部には、空洞１４内の空気を吸引して外部に脱気
するための吸気口２８を削孔（開口）する（ステップＳ
２）。When a cavity 14 as shown in FIG. 10 is found, as shown in FIG. 1, in order to fill the cavity 14 formed in the ground 18 below the pavement road 12 with the filling material 26, the cavity 14 is filled. At one end of the hole, a charging port 20 for charging the filling material 26 is drilled (opened), and a cavity 14 is formed.
In the other end of the hole, an air inlet 28 for sucking air in the cavity 14 and evacuating to the outside is drilled (opened) (Step S).
2).
【００１４】次に、投入口２０から空洞１４内に充填材
料２６を投入、すなわちその自重により落下させ、この
とき充填材料２６と一緒に、投入口２０から空洞１４内
に空気を送り込む。そしてこれと同時に、吸気口２８か
ら空洞１４内の空気を吸引して外部に脱気する（ステッ
プＳ５）。このとき、投入口２０からの充填材料２６及
び空気の供給と吸気口２８からの脱気を、連続的でなく
断続的に繰り返すようにする。Next, the filling material 26 is put into the cavity 14 from the inlet 20, that is, dropped by its own weight. At this time, air is sent into the cavity 14 from the inlet 20 together with the filling material 26. At the same time, the air in the cavity 14 is sucked from the air inlet 28 and degassed to the outside (step S5). At this time, the supply of the filling material 26 and the air from the inlet 20 and the deaeration from the inlet 28 are intermittently repeated, not continuously.
【００１５】ところで、空洞１４内に投入する充填材料
２６の量が予め分かっていないと、準備した充填材料２
６が多過ぎると余ってその処理に困るし、足りないから
といって二度に分けて施工することはできないので空洞
１４内に完全に充填材料２６を充填することができない
結果となる。このため、予め空洞１４内の容積を知る必
要がある（ステップＳ３）。By the way, if the amount of the filling material 26 to be charged into the cavity 14 is not known in advance, the prepared filling material 2
If the number is too large, the processing becomes too troublesome, and if it is insufficient, it is not possible to perform the work in two separate steps, so that the filling material 26 cannot be completely filled in the cavity 14. Therefore, it is necessary to know the volume inside the cavity 14 in advance (step S3).
【００１６】空洞１４内の容積は、舗装道路１２の下方
の見えない所にあるので容易に知ることはできない。こ
のため、空洞１４の投入口２０及び吸気口２８の一方を
塞いで投入口２０及び吸気口２８の他方に、エアータン
ク（図示してない）をホースを介して連通させ、ボイル
シャルルの法則を用いて計算して推定することができ
る。The volume inside the cavity 14 cannot be easily known because it is located under the paved road 12 and cannot be seen. For this reason, one of the inlet 20 and the inlet 28 of the cavity 14 is closed and an air tank (not shown) is connected to the other of the inlet 20 and the inlet 28 via a hose. Can be calculated and estimated.
【００１７】すなわち、空洞１４内の容積を求める式と
しては以下のものが考えられる。 Ｖ＝（Ｐｏ×Ｋｓ／Ｐ１−１）×Ｖｏ ……（１） 但し上記式（１）において、Ｖは空洞１４内の容積、Ｐ
ｏはエアータンク内の圧力、Ｋｓは空洞１４の囲りの地
盤１８の透気性を示す係数、Ｐ１は空洞１４内の計測圧
力、Ｖｏはエアータンク内の容積である。That is, the following formula can be considered as a formula for calculating the volume in the cavity 14. V = (Po × Ks / P 1 −1) × Vo (1) where V is the volume in the cavity 14, P
o is the pressure in the air tank, Ks is a coefficient indicating the permeability of the ground 18 of囲Ri cavity 14, P 1 is measured the pressure in the cavity 14, Vo is the volume of the air tank.
【００１８】そして、空洞１４が一定の容積を維持する
よう外部との連通を閉止していなければ上記空洞１４の
容積を算定することは難しいので、空洞１４内に送り込
んだ空気が外部の下水管等に洩れているようなときは、
空気が洩れないよう空気が洩れる孔を閉塞するために、
流動状態の石膏や速硬性セメント等の速硬性硬化材を流
し込んで固化させる必要がある（ステップＳ４）。It is difficult to calculate the volume of the cavity 14 unless communication with the outside is closed so that the cavity 14 maintains a constant volume. Etc.
In order to close the hole where the air leaks so that the air does not leak,
It is necessary to pour and harden a quick-setting hardening material such as gypsum or quick-setting cement in a fluid state (step S4).
【００１９】空洞１４の出入口を塞いでその内部に圧縮
空気を送り込み、そのときの空洞１４内部の圧力を計測
し、ピーク圧力以降の単位時間当りの圧力低下量から気
密性を確認することができる。ちなみに、上記係数Ｋｓ
は、ピーク圧力からピーク圧力計測後５秒後の圧力の勾
配のことである。この係数Ｋｓが０．５以上のときは空
洞１４から空気が洩れていて、０．２以下のときは洩れ
が無いことを意味する。また空洞１４内に送り込む圧縮
空気の圧力は、空洞１４内に生じているであろう空気の
逃げ道をそれ以上広げないために、概ね５００ｋＰａ以
下の低圧が望ましい。Compressed air is fed into the cavity 14 by closing the entrance and exit, and the pressure inside the cavity 14 at that time is measured, and the airtightness can be confirmed from the amount of pressure drop per unit time after the peak pressure. . By the way, the above coefficient Ks
Is the pressure gradient 5 seconds after the peak pressure measurement from the peak pressure. When the coefficient Ks is 0.5 or more, air leaks from the cavity 14, and when it is 0.2 or less, no air leaks. Further, the pressure of the compressed air sent into the cavity 14 is desirably a low pressure of about 500 kPa or less so as not to widen the escape path of the air which may be generated in the cavity 14.
【００２０】その空洞１４への空気がその外部に洩れて
いる量は以下の式から求めることができる。 Ｖα＋Ｖ＝Ｖｏ（Ｐｏ／Ｐ１−１） ……（２） 但し上記式（２）において、Ｖαは空洞１４から洩れて
いる空気の量、Ｖは空洞１４内の容積、Ｖｏはエアータ
ンク内の容積、Ｐｏはエアータンク内の圧力、Ｐ１は空
洞１４内の計測圧力である。The amount of air leaking to the cavity 14 to the outside can be obtained from the following equation. Vα + V = Vo (Po / P 1 −1) (2) where Vα is the amount of air leaking from the cavity 14, V is the volume in the cavity 14, and Vo is the volume in the air tank. volume, Po is the pressure in the air tank, P 1 is the measured pressure in the cavity 14.
【００２１】ところで、充填材料２６は主として土砂等
により構成されるが、土砂等に限定される必要はなく、
フロー値が２００ｍｍ以下の材料であれば何でもよい。
フロー値とは、内径８０ｍｍ、高さ８０ｍｍの底の無い
テスト用円筒を平面上に置き、その円筒内部に被測定材
料を充填後、そのテスト用円筒を上方に持ち上げて取り
除いた後に、その内部にあった被測定材料が自らの重さ
により崩れて平面上に裾野が拡がったときの、その裾野
の直径で示す値である。そして、充填材料２６には上記
土砂等の中に、セメント、石膏、石灰等の硬化材が均一
に混合されている。The filling material 26 is mainly composed of earth and sand, but is not limited to earth and sand.
Any material can be used as long as the material has a flow value of 200 mm or less.
The flow value is a test cylinder having an inner diameter of 80 mm and a height of 80 mm without a bottom placed on a flat surface. After filling the inside of the cylinder with the material to be measured, the test cylinder is lifted up and removed. Is a value indicated by the diameter of the skirt when the material to be measured collapsed due to its own weight and the skirt expanded on a plane. In the filling material 26, a hardening material such as cement, gypsum, or lime is uniformly mixed in the earth and sand.
【００２２】このような充填材料２６を空気の供給と共
に投入口２０から投入していくと、充填材料２６自体は
流動性が小さくとも、吸気口２８から空気を吸引して外
部に脱気すると共に、投入口２０から送り込まれる空気
により押されて、図１に示すように充填材料２６は徐々
に空洞１４内に充填していく。When such a filling material 26 is supplied from the charging port 20 together with the supply of air, the filling material 26 itself sucks air from the intake port 28 and degasses to the outside, even if the fluidity of the filling material 26 itself is small. The filling material 26 is gradually filled into the cavity 14 as shown in FIG.
【００２３】そして図２に示すように、空洞１４内に充
填材料２６がある程度充填されてくると、空気は空洞１
４の天端部と充填材料２６の上面部との間を通るように
なり、図１３に示す従来の空洞充填工法のように、空洞
１４の天端部と充填材料２６の上面部との間に局部的に
大きな空気溜り２４ができることはない。Then, as shown in FIG. 2, when the filling material 26 is filled into the cavity 14 to some extent, air is released from the cavity 1.
4 and the top surface of the filling material 26, and between the top end of the cavity 14 and the top surface of the filling material 26 as in the conventional cavity filling method shown in FIG. No large air pocket 24 is formed locally.
【００２４】すなわち、空洞１４の天端部と充填材料２
６の上面部との間を通る空気の流れる速度やその負圧等
により、図２中矢印Ａ，Ｂ部のように、空洞１４の天端
部が凹んでいる場所にも充填材料２６が入り込むように
揚力を受けて盛り上がっていく現象が生じる。That is, the top end of the cavity 14 and the filling material 2
Due to the speed of air flowing between the upper surface of the cavity 6 and the negative pressure thereof, the filling material 26 enters the place where the top end of the cavity 14 is concave as indicated by arrows A and B in FIG. As a result, a phenomenon occurs in which the swelling is caused by the lift.
【００２５】そして、最終的には図３に示すように、空
洞１４の天端部と充填材料２６の上面部との間の隙間が
無くなる位互いに接近、接触して、充填材料２６が空洞
１４内に隙間無く充填されることになる。そして、充填
後所定時間経過後に、充填材料２６に均一に混合された
硬化材により充填材料２６は硬化して、充填材料２６が
舗装道路１２上にかかる力を支持してその舗装厚さ部分
の陥没を確実に防止することができる（ステップＳ
５）。Finally, as shown in FIG. 3, the space between the top end of the cavity 14 and the upper surface of the filling material 26 comes close to and comes into contact with each other so that there is no gap between the top end of the filling material 26 and the filling material 26. Is filled without gaps. Then, after a lapse of a predetermined time after the filling, the filling material 26 is cured by the hardening material uniformly mixed with the filling material 26, and the filling material 26 supports the force applied on the pavement road 12 to reduce the pavement thickness portion. Depression can be reliably prevented (step S
5).
【００２６】そして最後に投入口２０と吸気口２８を舗
装道路１２の舗装材で埋めて閉孔する（ステップＳ６）
ことにより、その舗装道路１２上を車両が走行すること
ができるように完全に復元することができる（ステップ
Ｓ７）。Finally, the inlet 20 and the inlet 28 are filled with the pavement material of the pavement road 12 and closed (step S6).
Thus, the vehicle can be completely restored so that the vehicle can travel on the pavement road 12 (step S7).
【００２７】このように本発明の第１の実施の形態によ
れば、投入口２０から硬化材を添加した流動性の小さい
充填材料２６を投入すると共に空気を送り込み、これと
同時に吸気口２８から空洞１４内の空気を外部に吸引し
て脱気するようにすることにより、舗装道路１２の舗装
厚さ部分等を剥がしたり元通りに修復したりする等の手
数がかからない。As described above, according to the first embodiment of the present invention, the filling material 26 having a small flowability and the addition of a hardening material is supplied from the charging port 20 and the air is sent. Since the air in the cavity 14 is sucked to the outside and deaerated, it is not necessary to remove the pavement thickness portion or the like of the pavement road 12 or restore it to its original state.
【００２８】また、空洞１４の天端部に空気溜りができ
るのを防止できるので、空洞１４を充填材料２６により
隙間なく完全に充填することができ、さらに充填材料２
６の流動性が小さく粒子間が緻密であるため、固化後の
充填材料の支持力が大きな状態に長期にわたって維持さ
れることを保証することができる。Further, since it is possible to prevent the formation of air pockets at the top end of the cavity 14, the cavity 14 can be completely filled with the filling material 26 without any gaps.
Since the fluidity of No. 6 is small and the space between the particles is dense, it is possible to guarantee that the supporting force of the solidified filling material is maintained in a large state for a long time.
【００２９】図５は、本発明の第２の実施の形態につい
て説明するために参照する図である。前記第１の実施の
形態においては、舗装道路１２の下方の空洞１４を充填
材料２６により充填する場合について説明したが、この
第２の実施の形態においては、山の横にあけた廃坑３０
を充填材料２６により充填する場合に係る点において異
なるものである。FIG. 5 is a diagram referred to for describing a second embodiment of the present invention. In the first embodiment, the case where the cavity 14 below the pavement road 12 is filled with the filling material 26 has been described. However, in the second embodiment, the waste pit 30
In the case of filling with the filling material 26.
【００３０】このような廃坑３０を充填材料２６により
充填する場合は、従来は、図１４に示すように、廃坑３
０の入口に閉塞用壁３２を設け、この閉塞用壁３２を貫
いて充填材料２６の供給用配管３４と、廃坑３０内の空
気を外部に抜くための排気用配管３６が設けられてい
る。供給用配管３４はその長さ途中の何ヶ所かで支持部
材３８により支持されている。When such a waste pit 30 is filled with the filling material 26, conventionally, as shown in FIG.
A wall 32 for closing is provided at the entrance of 0, a pipe 34 for supplying the filling material 26 through the wall 32 for closing, and a pipe 36 for exhausting the air in the waste pit 30 to the outside. The supply pipe 34 is supported by a support member 38 at several points along its length.
【００３１】廃坑３０内に充填材料２６を充填する場合
は、供給用配管３４を通って外からの充填材料２６を廃
坑３０の奥の方から供給していく。このように供給され
た充填材料２６は廃坑３０の奥の方から徐々に充填され
ていくので、充填材料２６より閉塞用壁３２側の空間の
圧力が高くならないように、排気用配管３６を通って廃
坑３０内の空気を外部に逃がすようになっている。When filling the waste pit 30 with the filling material 26, the filling material 26 from outside is supplied through the supply pipe 34 from the back of the waste pit 30. The filling material 26 thus supplied is gradually filled from the depth of the abandoned mine 30, and passes through the exhaust pipe 36 so that the pressure in the space closer to the closing wall 32 than the filling material 26 does not increase. The air in the abandoned mine 30 is released to the outside.
【００３２】ところがこのような従来の空洞充填工法
は、廃坑３０内に人が入っていって、供給用配管３４を
支持する支持部材３８を取り付けなければならないの
で、落盤の可能性の高い廃坑３０や、断面積が小さい廃
坑３０の場合は、廃坑３０内に人が入っていけないの
で、空洞充填工法の施工ができないという問題がある。However, in such a conventional hollow filling method, since a person enters the waste pit 30 and a support member 38 for supporting the supply pipe 34 must be attached, the waste pit 30 having a high possibility of falling down is required. In the case of an abandoned pit 30 having a small cross-sectional area, there is a problem that a person cannot enter the abandoned pit 30, so that the cavity filling method cannot be performed.
【００３３】これに対して上記本発明の第２の実施の形
態においては、図５に示すように、供給用配管３４が廃
坑３０の１番奥の方に、廃坑３０の長さ方向に対して垂
直に配置されていると共に、閉塞用壁３２に吸引用配管
４０が配置されている。吸引用配管４０には真空ポンプ
（図示してない）が連結されていて、その真空ポンプに
より吸引用配管４０を通って廃坑３０から空気を吸引し
て脱気するようになっている。On the other hand, in the second embodiment of the present invention, as shown in FIG. 5, the supply pipe 34 is located at the deepest part of the waste pit 30 in the longitudinal direction of the waste pit 30. The suction pipe 40 is disposed on the closing wall 32. A vacuum pump (not shown) is connected to the suction pipe 40, and the vacuum pump sucks air from the waste pit 30 through the suction pipe 40 to deaerate the air.
【００３４】このような本発明の第２の実施の形態によ
れば、廃坑３０内の空気を吸引用配管４０から吸引して
排出すると共に、供給用配管３４から廃坑３０内に充填
材料２６と空気を供給することにより、廃坑３０に充填
材料２６をスムーズに充填することができる。According to the second embodiment of the present invention, the air in the waste pit 30 is sucked and discharged from the suction pipe 40 and the filling material 26 is supplied from the supply pipe 34 into the waste pit 30. By supplying the air, the waste pit 30 can be smoothly filled with the filling material 26.
【００３５】そして、図１４の従来の空洞充填工法のよ
うに、供給用配管３４を支持部材３８に支持させる必要
が無いので、中に人が入れないような廃坑３０において
も本発明の第２の実施の形態によれば、その廃坑３０に
充填材料２６を充填することが可能となる。Since the supply pipe 34 does not need to be supported by the support member 38 as in the conventional cavity filling method shown in FIG. 14, the second embodiment of the present invention can be applied to the abandoned pit 30 where no one can enter. According to the embodiment, the waste material 30 can be filled with the filling material 26.
【００３６】[0036]
【実施例】図６は、その内部を空洞に見立てた矩形空洞
モデル容器４５を示す図である。この矩形空洞モデル容
器４５の図中右端部には充填材料３１を供給するための
投入口４７が開口し、反対側の図中左端部には矩形空洞
モデル容器４５内の空気を外部に吸引するための吸気口
４９が開口している。また矩形空洞モデル容器４５内の
天端部には３ヶ所に障害物５１が下方に突出して設けら
れている。FIG. 6 is a view showing a rectangular cavity model container 45 in which the inside is regarded as a cavity. An opening 47 for supplying the filling material 31 is opened at the right end of the rectangular cavity model container 45 in the drawing, and the air inside the rectangular cavity model container 45 is sucked outside at the left end of the rectangular cavity model container 45 in the drawing. Intake port 49 is open. In addition, three obstacles 51 are provided at the top end of the rectangular cavity model container 45 so as to protrude downward.
【００３７】充填材料３１は、山砂１２００ｇ、セメン
ト１００ｇ、泥水６００ｇ等を混合したもので、その密
度は１．８７１ｇ／ｃｍ３、フロー値は１２５ｍｍと流
動性が小さい。The filling material 31 is a mixture of 1200 g of mountain sand, 100 g of cement, 600 g of muddy water, and the like, and its density is 1.871 g / cm 3 and its flow value is 125 mm, which is low in fluidity.
【００３８】このような矩形空洞モデル容器４５内に、
吸気口４９から矩形空洞モデル容器４５内の空気を吸引
して排出させながら、投入口４７から空気は入れないで
充填材料３１だけを投入することにより、矩形空洞モデ
ル容器４５内に充填材料３１を充填させた場合は、図示
のように障害物５１の両側部（又は片方の側部）に空気
溜り５３ができてしまい、矩形空洞モデル容器４５内に
充填材料３１を隅々まで完全に充填することができな
い。In such a rectangular hollow model container 45,
By injecting only the filling material 31 without introducing air from the inlet 47 while sucking and discharging the air in the rectangular cavity model container 45 from the intake port 49, the filling material 31 is put into the rectangular cavity model container 45. In the case of filling, the air pocket 53 is formed on both sides (or one side) of the obstacle 51 as shown in the figure, and the filling material 31 is completely filled into the rectangular cavity model container 45 to every corner. I can't.
【００３９】これに対し、投入口４７から矩形空洞モデ
ル容器４５内に充填材料３１と共に空気も一緒に送り込
むと、図７に示すように、障害物５１の側部に空気溜り
５３ができなくなり、矩形空洞モデル容器４５内の隅々
まで充填材料３１を充填することができることが確認さ
れている。そしてこのとき、充填材料３１及び空気の供
給と吸気口４９からの脱気を、断続的に繰り返すことが
有効であることが認められている。On the other hand, when air is fed together with the filling material 31 from the charging port 47 into the rectangular hollow model container 45, as shown in FIG. It has been confirmed that the filling material 31 can be filled to every corner in the rectangular cavity model container 45. At this time, it has been recognized that it is effective to intermittently repeat the supply of the filling material 31 and the air and the deaeration from the intake port 49.
【００４０】図８も、その内部を空洞に見立てた矩形空
洞モデル容器５５を示す図であり、この矩形空洞モデル
容器５５内の天端部には１ヶ所に、上記矩形空洞モデル
容器４５の障害物５１よりも大きな障害物５７が設けら
れている。FIG. 8 is also a view showing a rectangular cavity model container 55 in which the interior is regarded as a cavity. The obstruction of the rectangular cavity model container 45 is provided at one position at the top end in the rectangular cavity model container 55. An obstacle 57 larger than the object 51 is provided.
【００４１】このような矩形空洞モデル容器５５におい
ても、投入口４７から空気は入れないで充填材料３１だ
けを投入して矩形空洞モデル容器５５内に充填させた場
合は、図示のように障害物５７の両側部（又は片方の側
部）に空気溜り５３ができてしまい、矩形空洞モデル容
器５５内に充填材料３１を隅々まで完全に充填すること
ができない。Even in such a rectangular hollow model container 55, when only the filling material 31 is charged into the rectangular hollow model container 55 without air from the input port 47 to fill the rectangular hollow model container 55 as shown in FIG. The air pockets 53 are formed on both sides (or one side) of 57, and the filling material 31 cannot be completely filled in the rectangular hollow model container 55 to every corner.
【００４２】これに対し、投入口４７から矩形空洞モデ
ル容器５５内に充填材料３１と共に空気も一緒に送り込
むと、図９に示すように、障害物５７の側部に空気溜り
５３ができなくなり、矩形空洞モデル容器５５内の隅々
まで充填材料３１を充填することができることが確認さ
れている。そしてこのときも、充填材料３１及び空気の
供給と吸気口４９からの脱気を、断続的に繰り返すこと
が有効であることが認められている。On the other hand, when air is sent together with the filling material 31 from the charging port 47 into the rectangular hollow model container 55, as shown in FIG. 9, the air pool 53 cannot be formed on the side of the obstacle 57. It has been confirmed that the filling material 31 can be filled to every corner in the rectangular cavity model container 55. Also at this time, it has been recognized that it is effective to intermittently repeat the supply of the filling material 31 and the air and the deaeration from the intake port 49.
【００４３】なお、前記実施の形態においては舗装道路
１２の下方にできている空洞１４や廃坑３０を充填材料
２６により充填する場合について説明したが、本発明は
それらの空洞１４や廃坑３０に限定する必要はなく、ど
のような場所にできた空洞に対しても適用することが可
能である。In the above embodiment, the case where the cavity 14 and the waste pit 30 formed below the pavement road 12 are filled with the filling material 26 has been described. However, the present invention is limited to the cavity 14 and the waste pit 30. It does not need to be performed, and it can be applied to a cavity formed at any place.
【００４４】以上、本発明の実施の形態について具体的
に述べてきたが、本発明は上記の実施の形態に限定され
るものではなく、本発明の技術的思想に基づいて、その
他にも各種の変更が可能なものである。Although the embodiments of the present invention have been specifically described above, the present invention is not limited to the above-described embodiments, and may be variously modified based on the technical idea of the present invention. Can be changed.
【００４５】[0045]
【発明の効果】以上説明したように、本発明の空洞充填
工法によれば、投入口から硬化材を添加した流動性の小
さい充填材料を投入すると共に空気を送り込み、これと
同時に吸気口から空洞内の空気を外部に吸引して脱気す
るようにすることにより、舗装道路の舗装厚さ部分等を
剥がしたり元通りに修復したりする等の手数がかからな
い。As described above, according to the cavity filling method of the present invention, a low-fluidity filling material to which a hardening material is added is supplied from the charging port and air is sent, and at the same time, the cavity is supplied from the suction port. By sucking the inside air to the outside and degassing, it is not necessary to remove the pavement thickness portion of the pavement road or restore it to its original state.
【００４６】また、空洞の天端部に空気溜りができるの
を防止できるので、空洞を充填材料により隙間なく完全
に充填することができ、さらに充填材料の流動性が小さ
く粒子間が緻密であるため、固化後の充填材料の支持力
が大きな状態に長期にわたって維持されることを保証す
ることができる。Further, since it is possible to prevent the formation of air pockets at the top end of the cavity, the cavity can be completely filled with the filling material without any gaps, and the filling material has a low fluidity and a dense space between particles. Therefore, it is possible to guarantee that the support force of the solidified filling material is maintained in a large state for a long time.
【図１】本発明の第１の実施の形態に係る空洞充填工法
について説明するための空洞１４の断面図である。FIG. 1 is a cross-sectional view of a cavity for describing a cavity filling method according to a first embodiment of the present invention.
【図２】本発明の第１の実施の形態に係る空洞充填工法
について説明するための充填材料２６の断面図である。FIG. 2 is a cross-sectional view of a filling material 26 for describing a cavity filling method according to the first embodiment of the present invention.
【図３】本発明の第１の実施の形態に係る空洞充填工法
について説明するための充填材料２６の断面図である。FIG. 3 is a cross-sectional view of a filling material 26 for explaining a cavity filling method according to the first embodiment of the present invention.
【図４】本発明の第１の実施の形態に係る空洞充填工法
についての手順を示すフローチャートである。FIG. 4 is a flowchart showing a procedure of a cavity filling method according to the first embodiment of the present invention.
【図５】本発明の第２の実施の形態に係る空洞充填工法
について説明するための廃坑３０の断面図である。FIG. 5 is a sectional view of an abandoned mine 30 for explaining a cavity filling method according to a second embodiment of the present invention.
【図６】本発明の第１の実施例に係る矩形空洞モデル容
器４５の断面図である。FIG. 6 is a sectional view of a rectangular cavity model container 45 according to the first embodiment of the present invention.
【図７】本発明の第１の実施例における動作について説
明するための矩形空洞モデル容器４５の断面図である。FIG. 7 is a cross-sectional view of the rectangular cavity model container 45 for describing an operation in the first embodiment of the present invention.
【図８】本発明の第２の実施例に係る矩形空洞モデル容
器５５の断面図である。FIG. 8 is a sectional view of a rectangular cavity model container 55 according to a second embodiment of the present invention.
【図９】本発明の第２の実施例における動作について説
明するための矩形空洞モデル容器５５の断面図である。FIG. 9 is a sectional view of a rectangular cavity model container 55 for describing an operation in the second embodiment of the present invention.
【図１０】舗装道路１２の下方の地盤１８中にできた空
洞１４を示す断面図である。FIG. 10 is a sectional view showing a cavity formed in the ground below the paved road.
【図１１】従来の空洞充填工法について説明するための
地盤１８中の断面図である。FIG. 11 is a sectional view in the ground 18 for explaining a conventional cavity filling method.
【図１２】従来の空洞充填工法について説明するための
地盤１８中の断面図である。FIG. 12 is a cross-sectional view of a ground 18 for explaining a conventional cavity filling method.
【図１３】他の従来の空洞充填工法について説明するた
めの地盤１８中の断面図である。FIG. 13 is a cross-sectional view of the ground 18 for explaining another conventional cavity filling method.
【図１４】さらに他の従来の空洞充填工法について説明
するための廃坑３０の断面図である。FIG. 14 is a sectional view of an abandoned pit 30 for explaining still another conventional cavity filling method.
１２ 舗装道路 １４ 空洞 １６ 充填材料 １８ 地盤 ２０ 投入口 ２２ 充填材料 ２４ 空気溜り ２６ 充填材料 ２８ 吸気口 ３０ 廃坑 ３１ 充填材料 ３２ 閉塞用壁 ３４ 供給用配管 ３６ 排気用配管 ３８ 支持部材 ４０ 吸引用配管 ４５ 矩形空洞モデル容器 ４７ 投入口 ４９ 吸気口 ５１ 障害物 ５３ 空気溜り ５５ 矩形空洞モデル容器 ５７ 障害物 DESCRIPTION OF SYMBOLS 12 Paved road 14 Cavity 16 Filling material 18 Ground 20 Input port 22 Filling material 24 Air pocket 26 Filling material 28 Intake port 30 Abandoned pit 31 Filling material 32 Closing wall 34 Supply pipe 36 Exhaust pipe 38 Supporting member 40 Suction pipe 45 Rectangular cavity model container 47 inlet 49 intake port 51 obstacle 53 air pocket 55 rectangular cavity model container 57 obstacle
Claims (6)
口を開口し、 空洞の他端部に空洞内の空気を吸引する吸気口を開口
し、 前記投入口から硬化材を添加した流動性の小さい充填材
料を投入すると共に空気を送り込み、 これと同時に前記吸気口から空洞内の空気を外部に吸引
して脱気するようにしたことを特徴とする空洞充填工
法。1. An opening for charging a filling material is opened at one end of a cavity, an intake opening for sucking air in the cavity is opened at the other end of the cavity, and a hardening material is added from the inlet. A cavity filling method, characterized in that a filling material having a low property is supplied and air is sent in, and at the same time, air in the cavity is sucked to the outside from the intake port to be deaerated.
気の送り込みと、前記吸気口からの空洞内の空気の外部
への吸引を、断続的に行うようにした請求項１に記載の
空洞充填工法。2. The cavity according to claim 1, wherein the charging of the filling material and the feeding of the air from the charging port and the suction of the air in the hollow from the suction port to the outside are performed intermittently. Filling method.
洞に送り込んだ圧縮空気の圧力を利用して空洞内の気密
性及び容積を把握するようにした請求項１に記載の空洞
充填工法。3. The cavity filling method according to claim 1, wherein, prior to filling the cavity with the filling material, the airtightness and the volume in the cavity are grasped by using the pressure of the compressed air sent into the cavity. .
込んだ圧縮空気のピーク圧力以降の単位時間当りの圧力
低下量から求めるようにした請求項３に記載の空洞充填
工法。4. The cavity filling method according to claim 3, wherein the airtightness and the volume in the cavity are obtained from a pressure drop per unit time after a peak pressure of the compressed air sent into the cavity.
充填材料で空洞を充填する前段階で、流動状態の速硬性
硬化材を流し込み固化させることで圧縮空気の逃げ道を
閉塞するようにした請求項３に記載の空洞充填工法。5. The cavity having low airtightness due to leakage of compressed air,
4. The cavity filling method according to claim 3, wherein, before the filling of the cavity with the filling material, a rapid-hardening material in a flowing state is poured and solidified to block the escape path of the compressed air.
に空洞内に送り込む圧縮空気の圧力は概ね５００ｋＰａ
以下とするようにした請求項３に記載の空洞充填工法。6. The pressure of the compressed air sent into the cavity to determine the airtightness and volume inside the cavity is approximately 500 kPa.
The cavity filling method according to claim 3, wherein the method is as follows.
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| JP2001155629A JP4641662B2 (en) | 2001-05-24 | 2001-05-24 | Cavity filling method |
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| JP2001155629A JP4641662B2 (en) | 2001-05-24 | 2001-05-24 | Cavity filling method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019105062A (en) * | 2017-12-12 | 2019-06-27 | ケミカルグラウト株式会社 | Backfilling construction method of underground pipeline |
| CN113339056A (en) * | 2021-06-24 | 2021-09-03 | 中国矿业大学 | Fluidized gangue layer surface subsequent filling system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001107352A (en) * | 1999-10-13 | 2001-04-17 | Asanuma Corp | Underground cavity filling construction method |
| JP2002155527A (en) * | 2000-11-20 | 2002-05-31 | Asanuma Corp | Method of filling cavity with dry powder and granular material |
| JP2002348849A (en) * | 2001-05-29 | 2002-12-04 | Nikko Kensetsu Kk | Filling method for cavity in ground |
-
2001
- 2001-05-24 JP JP2001155629A patent/JP4641662B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001107352A (en) * | 1999-10-13 | 2001-04-17 | Asanuma Corp | Underground cavity filling construction method |
| JP2002155527A (en) * | 2000-11-20 | 2002-05-31 | Asanuma Corp | Method of filling cavity with dry powder and granular material |
| JP2002348849A (en) * | 2001-05-29 | 2002-12-04 | Nikko Kensetsu Kk | Filling method for cavity in ground |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019105062A (en) * | 2017-12-12 | 2019-06-27 | ケミカルグラウト株式会社 | Backfilling construction method of underground pipeline |
| CN113339056A (en) * | 2021-06-24 | 2021-09-03 | 中国矿业大学 | Fluidized gangue layer surface subsequent filling system and method |
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| JP4641662B2 (en) | 2011-03-02 |
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