Construction method of karst cave geological composite foundation
A technology of composite foundation and construction method, which is applied in basic structure engineering, soil protection, sheet pile wall, etc., can solve problems such as hidden safety hazards, poor bearing capacity in karst areas, unfavorable engineering quality, etc., to improve connectivity and ensure bearing capacity. ability, the effect of expanding the contact area
Inactive Publication Date: 2021-06-11
GUANGDONG FIFTHS CONSTRUCTIONAL ENG CO LTD
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Problems solved by technology
[0004] In view of the related technologies mentioned above, the inventor believes that there are the following technical defects: directly filling the karst cave with concrete, etc., resulting in poor bearing capacity in the karst area, which is not conducive to ensuring the quality of the project, and there is a large potential safety hazard
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[0041] In order to make the purpose, technical solutions and beneficial effects of this application clearer, the following in conjunction with the attached Figure 1-4 And embodiment, the application is described in further detail.
[0042] refer to figure 1 , the embodiment of the present application discloses a karst cave geological composite foundation. The karst cave geological composite foundation includes the original soil layer, the karst cave 2 located in the original soil layer, the pile hole 1 vertically penetrating the karst cave 2 opened in the original soil layer, and the pile hole 1 filled in the karst cave The gravel soil 3 in 2, the extruded and expanded support disc space 4 corresponding to the location of the karst cave 2 in the pile hole 1, and the reinforcement cage 5 arranged in the pile hole 1.
[0043] refer to figure 1 and figure 2 , the reinforcement cage 5 in the embodiment of the present application includes a main reinforcement cage 51 and an ex...
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The invention relates to the technical field of civil construction, and particularly relates to a construction method of a karst cave geological composite foundation. The construction method comprises the following steps that a, according to the designed surveying and mapping pile body position, geological exploration is conducted on the pile body position; b, drilling is conducted on the pile body position containing a karst cave, and a steel casing is synchronously placed till a drilling machine drills through the top of the karst cave; c, the karst cave is filled with gravelly soil to the karst cave top plate position, and a punching hammer is utilized for repeatedly punching and extruding the gravelly soil till the karst cave is filled compactly; d, the drilling machine is adopted for drilling at the karst cave backfill position, a crane is adopted for hoisting in an extruding and expanding support disc machine, extruding, expanding and rotating are conducted at the preset position, and an extruding and expanding support disc space is formed; e, drilling continues to be conducted, the steel casing is synchronously placed till the next karst cave is encountered or the drilling depth reaches the designed elevation, and if the next karst cave is encountered, the steps b, c and d are repeated for drilling construction; f, a reinforcement cage is placed; and g, a guide pipe method is adopted for pouring concrete, and a pile body and a support disc are formed. According to the construction method, the bearing capability of the foundation overall structure is improved.
Description
technical field [0001] The present application relates to the technical field of civil construction, in particular to a construction method of karst cave geological composite foundation. Background technique [0002] As a kind of unfavorable geological disaster, karst is common in limestone areas, and it is often encountered in the process of building construction in the mountainous areas of Southwest my country. Beaded karst is one of the karst types, which refers to a series of beaded caves formed due to karstization. [0003] A common method for dealing with caves is to fill the caves with grout, concrete or other waste residues, or to reinforce the foundation by passing pile foundations through the caves. [0004] Regarding the related technologies mentioned above, the inventor believes that there are the following technical defects: directly filling the karst caves with concrete, etc., resulting in poor bearing capacity in karst areas, which is not conducive to ensurin...
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Login to View More IPC IPC(8): E02D3/00E02D3/08E02D5/34
CPCE02D3/00E02D3/08E02D5/34
Inventor 詹剑波黄俊云彭玉海
Owner GUANGDONG FIFTHS CONSTRUCTIONAL ENG CO LTD