Foundation pit enclosure strengthening method of soft soil foundation: Fid-Bau Portal

Foundation pit enclosure strengthening method of soft soil foundation

ZHOU ZHAODI

The invention discloses a foundation pit enclosure strengthening method of a soft soil foundation. The method comprises the following steps of filling an area from the ground of a weak bearing layer at the edge of a foundation pit downwards to the position below the depth of the foundation pit with a filler mixed with an adhesive and/or a curing agent, and a sand aggregate and/or a recycled aggregate so as to form an integral gapless strengthening area at the edge of the foundation pit. The foundation pit enclosure strengthening method of the soft soil foundation is characterized in that the integral gapless strengthening area is arranged in the weak bearing layer at the edge of the foundation pit, so that the foundation pit enclosure strength is improved; after the strengthening area is hardened, not only the soil retaining strength is improved, but also a water stopping curtain can be formed; in addition, the strengthening area is in an integral gapless form, so that the bearing capacity is stronger than that of a split strengthening area, the foundation pit enclosure strength is greatly improved, the bending resistance is improved, and a foundation pit wall is prevented from toppling; and the method is suitable for the weak bearing layers of various soil types, is suitable for construction of various foundation pits, reduces the engineering cost of the foundation pit, improves the engineering applicability, and is easy to widely apply.

本发明公开了一种软土地基的基坑围护强化方法，在基坑边缘的弱承载层地面向下至基坑深度以下区域填充混合有胶粘剂和/或固化剂及砂石骨料和/或再生骨料的填充剂以使基坑边缘形成整体式无间隙加固区。本发明提供的软土地基的基坑围护强化方法为在基坑边缘的弱承载层中设置整体式无间隙加固区，以提高基坑围护强度，加固区硬化后不但挡土强度提高还能形成止水帷幕，另外加固区为整体式无间隙的形式，具有比分体式的加固区更强的承受能力，大大提高了基坑围护强度，且抗弯能力提高，防止基坑壁倾倒，适用于多种土质种类的弱承载层，并适用于多种基坑的建设，降低基坑工程成本，提高工程适用性，易于广泛应用。

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