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Construction method for ultra-deep equal-thickness cement soil wall realizing bottom drop into rock
The invention provides a construction method for an ultra-deep equal-thickness cement soil wall realizing bottom drop into rock. The method comprises the steps of surveying and setting out; excavatinga cement soil wall working groove; determining the positions, the diameters, the depths and the spacing of guide holes; using a reverse circulation drilling pile machine for forming the guide holes,discharging pebble coarse ballast in an original stratum and drilling ballast crushed by a reverse circulation drill bit out of the drilled holes through a mud reverse circulation system, and precipitating soil of the fine particle size into the holes by using the mud reverse circulation system; and finally, completing the construction of the straight-line section of the cement soil wall through wall forming of the TRD construction method. According to the method, the original stratum can be effectively improved, the transverse and longitudinal cutting resistance during construction by the TRDconstruction method is reduced, the problems, generated in complex strata such as ultra-deep layers, pebble-containing layers, rock layers and the like, of large abrasion, large cutting resistance, low cutting efficiency and high mechanical failure rate of a mechanical tool array in a pebble layer based on a traditional TRD construction method are solved, and meanwhile, the stirred cement soil wall is more uniform and stable. The method is rational in design, safe in construction, simple, convenient and efficient, low in cost and suitable for popularization.
本发明提供一种超深且能够落底入岩的等厚度水泥土墙的施工方法，包括测量放线；开挖水泥土墙工作沟槽；确定引孔位置、直径、深度及间距；利用反循环钻孔桩机引孔，并通过泥浆反循环系统将原有地层内的卵石粗碴和经过反循环钻头破碎的钻碴排出钻孔外，利用泥浆反循环系统把细粒径土沉淀至孔内；最后通过TRD工法成墙完成直线段水泥土墙的施工。本发明可有效改善原有地层，减少TRD工法机施工时的横向及纵向切割阻力，有效解决在超深、含卵石层、岩层等复杂地层中，传统TRD工法机刀排在卵石层中磨损大、切割阻力大、切割效率低下、机械故障率高的难题，同时使搅拌后的水泥土墙更均匀、稳定。本发明设计合理，施工安全、简便高效，成本低廉，适宜推广。
Construction method for ultra-deep equal-thickness cement soil wall realizing bottom drop into rock
The invention provides a construction method for an ultra-deep equal-thickness cement soil wall realizing bottom drop into rock. The method comprises the steps of surveying and setting out; excavatinga cement soil wall working groove; determining the positions, the diameters, the depths and the spacing of guide holes; using a reverse circulation drilling pile machine for forming the guide holes,discharging pebble coarse ballast in an original stratum and drilling ballast crushed by a reverse circulation drill bit out of the drilled holes through a mud reverse circulation system, and precipitating soil of the fine particle size into the holes by using the mud reverse circulation system; and finally, completing the construction of the straight-line section of the cement soil wall through wall forming of the TRD construction method. According to the method, the original stratum can be effectively improved, the transverse and longitudinal cutting resistance during construction by the TRDconstruction method is reduced, the problems, generated in complex strata such as ultra-deep layers, pebble-containing layers, rock layers and the like, of large abrasion, large cutting resistance, low cutting efficiency and high mechanical failure rate of a mechanical tool array in a pebble layer based on a traditional TRD construction method are solved, and meanwhile, the stirred cement soil wall is more uniform and stable. The method is rational in design, safe in construction, simple, convenient and efficient, low in cost and suitable for popularization.
本发明提供一种超深且能够落底入岩的等厚度水泥土墙的施工方法，包括测量放线；开挖水泥土墙工作沟槽；确定引孔位置、直径、深度及间距；利用反循环钻孔桩机引孔，并通过泥浆反循环系统将原有地层内的卵石粗碴和经过反循环钻头破碎的钻碴排出钻孔外，利用泥浆反循环系统把细粒径土沉淀至孔内；最后通过TRD工法成墙完成直线段水泥土墙的施工。本发明可有效改善原有地层，减少TRD工法机施工时的横向及纵向切割阻力，有效解决在超深、含卵石层、岩层等复杂地层中，传统TRD工法机刀排在卵石层中磨损大、切割阻力大、切割效率低下、机械故障率高的难题，同时使搅拌后的水泥土墙更均匀、稳定。本发明设计合理，施工安全、简便高效，成本低廉，适宜推广。
Construction method for ultra-deep equal-thickness cement soil wall realizing bottom drop into rock
一种超深且能够落底入岩的等厚度水泥土墙的施工方法
YANG HAIBO (author) / FENG SHANGTAO (author) / YU XIAOJIE (author) / WANG RONGJUN (author) / TANG SHENGYONG (author) / SUN NING (author)
2020-10-09
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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