Construction method for two-core expanded pile anchor foundation pit supporting structure
A technology of foundation pit support and construction method, which is applied in basic structure engineering, excavation, construction, etc., can solve the problems of long construction period, material consumption and high cost, and achieve the effect of saving steel bar consumption, shortening construction period and reducing construction cost.
Active Publication Date: 2020-08-14
CHINA CONSTR SEVENTH ENG DIVISION CORP LTD
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Problems solved by technology
Often after a project is completed, temporary roads need to be built and demolished many times, resulting in long construction periods, high costs, and serious material consumption.
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[0043] As a specific embodiment of the double-core expansion pile anchor foundation pit support structure construction method provided by the present invention, the construction of the anchor rod 6 on the side of the support pit close to the slope protection 8 includes:
[0044] After the site is leveled and the drilling machine is in place, the pilot hole is carried out, and the hole is reamed after the pilot hole is completed.
[0045] Anchor the finished anchor rod 6 at the reaming place, and after the anchor rod 6 reaches the preset depth, pour cement slurry into the bag on the anchor rod 6 .
[0046] In the present invention, it is first necessary to level the field. First clear the obstacles and weak foundation soil in the site, then measure the plane position of the anchor rod 6 according to the anchor rod 6 hole position required by the design, and use wooden piles or steel bars as marks and numbers. The position of the 6 holes of the anchor rod allows a deviation of ...
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The invention provides a construction method for a two-core expanded pile anchor foundation pit supporting structure, which belongs to the technical field of supporting construction. The constructionmethod comprises the following steps: performing supporting pile construction at one side, close to a foundation pit to be excavated, of a supporting pit, and performing anchor rod construction at oneside, close to a protective slope, of the supporting pit; separately connecting a first crown beam reinforcing steel bar and a second crown beam reinforcing steel bar onto the anchor rod and a main rib of the supporting pile; after pouring is accomplished, establishing an earth retaining wall which is arranged in a length direction of the second crown beam reinforcing steel bar, on the basis of an earth retaining wall reinforcing steel bar; and constructing reinforcement ground on the top of backfilled earth, and arranging the reinforcement ground and the earth retaining wall at the same height as a temporary construction road. Compared with a conventional supporting structure, the construction method for the two-core expanded pile anchor foundation pit supporting structure greatly savesconcrete usage amount and reinforcement usage amount; moreover, the temporary road is established at the outer side of the foundation pit to be excavated; and after foundation pit excavation is accomplished, once dismounting only needs, so that construction cost is reduced, a construction period is shortened, and construction production efficiency is improved.
Description
technical field [0001] The invention belongs to the technical field of support construction, and more specifically relates to a construction method for a support structure of a double-core expansion pile anchor foundation pit. Background technique [0002] With the continuous development of the construction industry, accidents in deep foundation pits have occurred frequently in recent years. In particular, the traditional anchor cable support method, inclined anchors, has a great impact on surrounding buildings. How to reduce the impact on the surrounding environment and improve the depth The safety of foundation pit has become a difficult problem in the research of construction industry. Before excavating the foundation pit, it is necessary to construct support piles and anchor rods on the outside of the foundation pit to be dug. Due to the transportation of equipment and materials, it is necessary to construct temporary roads at the construction site. Since buildings need...
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Login to View More IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 危爱元曹维存徐洪瑞夏春亮周鹏吴安明杜彬彬李延风
Owner CHINA CONSTR SEVENTH ENG DIVISION CORP LTD