Foundation reinforcement method of outdoor advertisement signboard
?。?）基礎(chǔ)擴(kuò)大法：通過設(shè)置混凝土圍套或鋼筋混凝土圍套，增加廣告牌底部基礎(chǔ)的面積，改變因廣告牌基礎(chǔ)底面積偏小、承載力不足而產(chǎn)生的地基不均勻沉降。
(1) Foundation expansion method: by setting concrete or reinforced concrete sheaths, the area of the foundation at the bottom of the billboard is increased, and the uneven settlement of the foundation caused by the small area and insufficient bearing capacity of the billboard foundation is changed.
?。?）坑式托換法：直接在被托換基礎(chǔ)下挖坑后澆筑混凝土。
(2) Pit underpinning method: concrete is poured directly after digging the pit under the underpinned foundation.
?。?）樁式托換法：采用在廣告牌基礎(chǔ)的下部或兩側(cè)設(shè)置靜壓柱、打入樁、灌注樁等各類樁來進(jìn)行基礎(chǔ)加固的方法。
(3) Pile underpinning method: static pressure column, driven pile and cast-in-place pile are set at the bottom or both sides of the billboard foundation to reinforce the foundation.
?。?）灌漿托換法：將化學(xué)漿液均勻地注入地基中，通過這些漿液把原來松散的土質(zhì)或裂縫膠結(jié)固化，以達(dá)到提高地基承載力，防水抗?jié)B的作用。
(4) Grouting underpinning method: the chemical slurry is evenly injected into the foundation, and the original loose soil or cracks are cemented and solidified by these slurry, so as to improve the bearing capacity of the foundation, waterproof and impermeable.
糾偏就是采用人為的手段使已傾斜的地基進(jìn)行反向傾斜的操作，以達(dá)到矯正戶外廣告牌傾斜的目的。
Rectifying deviation is to use artificial means to make the tilted foundation reverse tilt operation, so as to achieve the purpose of rectifying the inclination of outdoor billboards.
常用的戶外廣告牌地基糾偏的方法有以下幾種：（1）迫降糾偏法：在戶外廣告牌基礎(chǔ)沉降多的一側(cè)面采取阻止下沉的措施，而在另一側(cè)采取迫降措施。迫降方法包括：加載鋼錠或石塊、修建懸臂梁、掏土迫降、注水糾偏等。（2）頂升糾偏法：在傾斜廣告牌基礎(chǔ)沉降大的部位，通過調(diào)整廣告牌各部分的頂升量，使其沿某一點(diǎn)或某一直線作整體平面轉(zhuǎn)動(dòng)，以達(dá)到恢復(fù)原位的目的
The commonly used foundation rectification methods of outdoor billboard are as follows: (1) forced landing correction method: take measures to prevent subsidence on one side of outdoor billboard foundation settlement, and take forced landing measures on the other side. The methods of forced landing include loading steel ingot or stone, building cantilever beam, digging soil and rectifying deviation by water injection. (2) Lifting rectification method: in the part with large foundation settlement of inclined billboard, adjust the jacking amount of each part of the billboard to make it rotate along a certain point or a straight line to achieve the purpose of restoring the original position
