阅读说明：本技术 一种基坑土体坍塌应急支护方法 (Emergency support method for foundation pit soil collapse ) 是由 姜坤 万廷荣 刘璇 张思斌 覃鹤 周雨婷 施正阳 赵红霞 于 2020-11-11 设计创作，主要内容包括：本发明公开了一种基坑土体坍塌应急支护方法,包括以下步骤：当发现基坑土体坍塌时,先在土体坍塌区域打入若干根锚管,然后就近采掘砂土装入麻袋中获得若干袋袋装砂土,再将袋装砂土封盖在土体坍塌区域。采用本发明的技术方案,首先在土体坍塌区域打入若干根锚管及时稳定土体,锚管优选为钢管,可就近利用施工现场存放的钢管进行处理,从而减少土体坍塌造成的损害,另外再使用袋装砂土、杉木压盖在土体坍塌区域,通过向锚管内注入水泥砂浆,待水泥砂浆凝结后,起到了稳固土体的作用,降低了安全隐患,袋装砂土、杉木以及水泥砂浆在施工现场均较容易获得,有利于施工现场人员对出现的土体坍塌作出快速反应,及时进行支护,避免慌乱。(The invention discloses an emergency support method for foundation pit soil collapse, which comprises the following steps: when the foundation pit soil body collapses, firstly, a plurality of anchor pipes are driven into the soil body collapse area, then the near-excavated sandy soil is filled into the hemp bags to obtain a plurality of bags of bagged sandy soil, and then the bags of sandy soil are covered on the soil body collapse area. According to the technical scheme, firstly, a plurality of anchor pipes are driven into a soil mass collapse area to stabilize the soil mass in time, the anchor pipes are preferably steel pipes, the steel pipes stored in a construction site can be utilized nearby for treatment, so that damage caused by soil mass collapse is reduced, in addition, bagged sandy soil and fir are used for pressing and covering the soil mass collapse area, cement mortar is injected into the anchor pipes, after the cement mortar is condensed, the effect of stabilizing the soil mass is achieved, the potential safety hazard is reduced, the bagged sandy soil, the fir and the cement mortar are easy to obtain in the construction site, the rapid response of construction site personnel to the soil mass collapse is facilitated, the support is timely carried out, and the confusion is avoided.)

1. An emergency support method for foundation pit soil collapse is characterized in that: the method comprises the following steps:

when the foundation pit soil body collapses, firstly, a plurality of anchor pipes are driven into the soil body collapse area, then the near-excavated sandy soil is filled into the hemp bags to obtain a plurality of bags of bagged sandy soil, and then the bags of sandy soil are covered on the soil body collapse area.

2. The emergency supporting method for foundation pit soil collapse according to claim 1, wherein: the emergency support method for foundation pit soil collapse further comprises the following steps: after a plurality of anchor pipes are driven into the soil body collapse area, a fir gland is used for pressing between two adjacent anchor pipes.

3. The emergency supporting method for foundation pit soil collapse according to claim 1, wherein: the emergency support method for foundation pit soil collapse further comprises the following steps: and after a plurality of anchor pipes are driven into the soil body collapse area, cement mortar is injected into the anchor pipes.

4. An emergency support method for foundation pit soil collapse according to claim 3, wherein: the cement mortar is pumped and injected by a booster pump, and the injection pressure of the cement mortar is not less than 0.8MPa to 1.5 MPa.

5. The emergency supporting method for foundation pit soil collapse according to claim 1, wherein: the depth of the anchor pipe inserted into the soil body is not less than 2 m.

6. The emergency supporting method for foundation pit soil collapse according to claim 1, wherein: the outer diameter of the anchor pipe is not less than 60 mm.

7. The emergency supporting method for foundation pit soil collapse according to claim 1, wherein: the distance between two adjacent anchor pipes is 1.5-3 m.

8. The emergency supporting method for foundation pit soil collapse according to claim 1, wherein: the anchor pipe is made of steel.

Technical Field

The invention particularly relates to the technical field of constructional engineering, and particularly relates to an emergency supporting method for foundation pit soil collapse.

Background

Along with the rapid development of national economy in China, the urbanization construction is continuously expanded, the rapid development of civil engineering is driven, and high-rise buildings become more and more pets for urban construction. A large number of underground structure buildings such as underground parking factories, basements, underground subway stations, underground civil air defense projects and the like are gradually raised, deep foundation pit construction projects are also gradually brilliant, and the deep foundation pit construction projects must be developed and perfected, which has important significance for guaranteeing the quality and safety of the projects and completing the economy of construction tasks, the deep foundation pit construction is self-evident to the importance of super high-rise buildings and large-scale construction, the deep foundation pit technology is the basis for the survival of the safe operation of the deep foundation pit construction, in the current urban construction, the deep foundation pit projects are continuously perfected through continuous practical experience, and an economical and reasonable supporting structure system which is suitable for different foundation pit depths and geological conditions is gradually formed. The existing deep foundation pit supporting structure generally adopts a mode of anchor rods, anchor cables, cat nets and concrete spraying for supporting, however, the situation of sudden collapse of foundation pit soil bodies is often encountered in deep foundation pit engineering, and under the emergency situation, conventional supporting equipment is often not enough in preparation, so that constructors are difficult to take effective measures to timely cope with the situation, and the construction safety is influenced.

Disclosure of Invention

In order to solve the technical problem, the invention provides an emergency support method for foundation pit soil collapse.

The invention is realized by the following technical scheme.

The invention provides an emergency support method for foundation pit soil collapse, which comprises the following steps:

when the foundation pit soil body collapses, firstly, a plurality of anchor pipes are driven into the soil body collapse area, then the near-excavated sandy soil is filled into the hemp bags to obtain a plurality of bags of bagged sandy soil, and then the bags of sandy soil are covered on the soil body collapse area.

The emergency support method for foundation pit soil collapse further comprises the following steps: after a plurality of anchor pipes are driven into the soil body collapse area, a fir gland is used for pressing between two adjacent anchor pipes.

The emergency support method for foundation pit soil collapse further comprises the following steps: and after a plurality of anchor pipes are driven into the soil body collapse area, cement mortar is injected into the anchor pipes.

The cement mortar is pumped and injected by a booster pump, and the injection pressure of the cement mortar is not less than 0.8MPa to 1.5 MPa.

The depth of the anchor pipe inserted into the soil body is not less than 2 m.

The outer diameter of the anchor pipe is not less than 60 mm.

The distance between two adjacent anchor pipes is 1.5-3 m.

The anchor pipe is made of steel.

The invention has the beneficial effects that: by adopting the technical scheme of the invention, when the foundation pit soil body collapses, firstly, a plurality of anchor pipes are driven into the soil body collapse area to stabilize the soil body in time, the anchor pipes are preferably steel pipes, the steel pipes stored in a construction site can be utilized nearby, so that the damage caused by the soil body collapse is reduced, in addition, bagged sandy soil and fir are pressed on the soil body collapse area to further stabilize the soil body, so that the potential safety hazard is reduced, cement mortar is injected into the anchor pipes, the soil body is further stabilized after the cement mortar is condensed, the potential safety hazard is reduced, the bagged sandy soil, the fir and the cement mortar are easily obtained in the construction site, the rapid response of construction site personnel to the soil body collapse is facilitated, the support is carried out in time, and the confusion is avoided.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

The invention discloses an emergency support method for foundation pit soil collapse, which comprises the following steps of 1, and is characterized in that: the method comprises the following steps:

when the foundation pit soil body collapses, firstly, a plurality of anchor pipes are driven into the soil body collapse area, then the near-excavated sandy soil is filled into the hemp bags to obtain a plurality of bags of bagged sandy soil, and then the bags of sandy soil are covered on the soil body collapse area.

In addition, the emergency supporting method for foundation pit soil collapse further comprises the following steps: after a plurality of anchor pipes are driven into the soil body collapse area, a fir gland is used for pressing between two adjacent anchor pipes. And after a plurality of anchor pipes are driven into the soil body collapse area, cement mortar is injected into the anchor pipes. The cement mortar is pumped and injected by a booster pump, and the injection pressure of the cement mortar is not less than 0.8MPa to 1.5 MPa. Cement mortar with proper pressure is pumped by the booster pump, so that the cement mortar can be fully filled in the anchor pipe, and the anchor pipe is expanded, so that the soil body is stabilized.

In addition, the depth of the anchor pipe inserted into the soil body is not less than 2 m. The outer diameter of the anchor pipe is not less than 60 mm. The distance between two adjacent anchor pipes is 1.5-3 m. The anchor pipe is made of steel.

By adopting the technical scheme of the invention, when the foundation pit soil body collapses, firstly, a plurality of anchor pipes are driven into the soil body collapse area to stabilize the soil body in time, the anchor pipes are preferably steel pipes, the steel pipes stored in a construction site can be utilized nearby, so that the damage caused by the soil body collapse is reduced, in addition, bagged sandy soil and fir are pressed on the soil body collapse area to further stabilize the soil body, so that the potential safety hazard is reduced, cement mortar is injected into the anchor pipes, the soil body is further stabilized after the cement mortar is condensed, the potential safety hazard is reduced, the bagged sandy soil, the fir and the cement mortar are easily obtained in the construction site, the rapid response of construction site personnel to the soil body collapse is facilitated, the support is carried out in time, and the confusion is avoided.