A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
FLOATATION PREVENTIVE METHOD OF MANHOLE
PROBLEM TO BE SOLVED: To provide a method for preventing floatation by fixing a manhole to the natural ground.SOLUTION: A floatation preventive method comprises a process of investigating soil bearing power in the depth direction of a plurality of positions capable of avoiding a pipe conduit B connected to the manhole in the natural ground C on the outer periphery of a backfill sediment layer D around the manhole A, a process of determining the anchor positions (3a and 5) including the depth of an anchor and a distance from the manhole on the basis of a result of the investigated soil bearing power of the natural ground, and thereafter forming a through-hole 2 in a sidewall of the manhole and forming a hole of reaching an anchor position by penetrating through the backfill sediment layer, a process of making the tip reach the anchor position by inserting a support member 3 into the hole from the through-hole and projecting the rear end from the sidewall of the manhole, a process of filling a grout material in the hole for inserting the support member and a process of installing the rear end of the support member on the sidewall of the manhole via an installation member 4 after hardening the grout material filled in the hole.
【課題】マンホールを地山に固定することで浮上を防止するための工法を提供する。【解決手段】マンホールＡの周囲の埋戻し土砂層Ｄの外周の地山Ｃで該マンホールに接続されている管路Ｂを回避し得る複数の位置の深さ方向の地耐力を調査する工程、調査した地山の地耐力の結果に基づいてアンカーの深さとマンホールからの距離を含むアンカー位置（３ａ、５）を決定し、その後、マンホールの側壁に貫通孔２を形成すると共に埋戻し土砂層を貫通してアンカー位置に到達する穴を形成する工程、貫通孔から前記穴に支持部材３を挿通して先端をアンカー位置に到達させると共に後端をマンホールの側壁から突出させる工程、支持部材を挿通した前記穴にグラウト材を充填する工程、前記穴に充填されたグラウト材が硬化した後、支持部材の後端を取付部材４を介してマンホールの側壁に取り付ける工程、を有する。【選択図】 図６
FLOATATION PREVENTIVE METHOD OF MANHOLE
PROBLEM TO BE SOLVED: To provide a method for preventing floatation by fixing a manhole to the natural ground.SOLUTION: A floatation preventive method comprises a process of investigating soil bearing power in the depth direction of a plurality of positions capable of avoiding a pipe conduit B connected to the manhole in the natural ground C on the outer periphery of a backfill sediment layer D around the manhole A, a process of determining the anchor positions (3a and 5) including the depth of an anchor and a distance from the manhole on the basis of a result of the investigated soil bearing power of the natural ground, and thereafter forming a through-hole 2 in a sidewall of the manhole and forming a hole of reaching an anchor position by penetrating through the backfill sediment layer, a process of making the tip reach the anchor position by inserting a support member 3 into the hole from the through-hole and projecting the rear end from the sidewall of the manhole, a process of filling a grout material in the hole for inserting the support member and a process of installing the rear end of the support member on the sidewall of the manhole via an installation member 4 after hardening the grout material filled in the hole.
【課題】マンホールを地山に固定することで浮上を防止するための工法を提供する。【解決手段】マンホールＡの周囲の埋戻し土砂層Ｄの外周の地山Ｃで該マンホールに接続されている管路Ｂを回避し得る複数の位置の深さ方向の地耐力を調査する工程、調査した地山の地耐力の結果に基づいてアンカーの深さとマンホールからの距離を含むアンカー位置（３ａ、５）を決定し、その後、マンホールの側壁に貫通孔２を形成すると共に埋戻し土砂層を貫通してアンカー位置に到達する穴を形成する工程、貫通孔から前記穴に支持部材３を挿通して先端をアンカー位置に到達させると共に後端をマンホールの側壁から突出させる工程、支持部材を挿通した前記穴にグラウト材を充填する工程、前記穴に充填されたグラウト材が硬化した後、支持部材の後端を取付部材４を介してマンホールの側壁に取り付ける工程、を有する。【選択図】 図６
FLOATATION PREVENTIVE METHOD OF MANHOLE
マンホールの浮上防止工法
OOKA SHINKICHI (author) / KONISHI YASUHIKO (author) / KITAJIMA HISASHI (author) / CHO MITSUYOSHI (author)
2015-07-06
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
Manhole cover locking manhole having an abrasion preventive structure
| European Patent Office | 2021
Concrete box floatation apparatus and utilizing floatation method
European Patent Office | 2021
Concrete box floatation apparatus and utilizing floatation method
| European Patent Office | 2020