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Construction method for secant pile enclosure structure of deep foundation pit in sandy gravel stratum
The invention discloses a sandy gravel stratum deep foundation pit secant pile enclosure structure construction method, and relates to the technical field of foundation pit enclosure structures. Comprising the following steps that a guide groove is built in a construction position; the pile casing is driven into the stratum through the guide groove, and rotary excavating is conducted in the pile casing to the dense pebble bed; according to the construction sequence of the plain concrete cast-in-place piles firstly and then the reinforced concrete cast-in-place piles, enclosure walls are sequentially and alternately driven in the pile casing in the mode that the plain concrete cast-in-place piles and the reinforced concrete cast-in-place piles are meshed with each other firstly; and a top beam is built at the top of the enclosure wall body. The reinforced concrete cast-in-place piles and the plain concrete cast-in-place piles are connected into a whole in an engaged mode, so that the supporting strength of the enclosure structure is improved, the anti-seepage effect is achieved, shotcrete and anchor supporting is reduced, the foundation pit excavation exposure time is shortened, foundation pit dry groove operation is guaranteed, and the foundation pit dry groove operation efficiency is improved. Therefore, the foundation pit engineering quality and safety are ensured, the total construction period is shortened, the engineering cost is reduced, and meanwhile the ecological environment can be protected.
本发明公开了一种砂卵石地层深基坑咬合桩围护结构施工方法，涉及基坑围护结构技术领域；包括以下步骤：在施工位置筑设导向槽；将护筒经导向槽打入地层内，并在所述护筒内进行旋挖并挖至密实卵石层内；按照先素混凝土灌注桩再钢筋混凝土灌注桩的施工顺序，在所述护筒内以先素混凝土灌注桩和钢筋混凝土灌注桩相互咬合的方式依次交替打设围护墙体；在所述围护墙体顶部筑设冠梁。本发明将钢筋混凝土灌注桩与素混凝土灌注桩相互咬合连接成整体，以提高围护结构的支撑强度和起到防渗作用，减少了喷锚支护，不仅缩短了基坑开挖暴露时间，保证了基坑干槽作业，从而确保了基坑工程质量与安全、缩短了总工期、降低工程成本，同时也能够保护生态环境。
Construction method for secant pile enclosure structure of deep foundation pit in sandy gravel stratum
The invention discloses a sandy gravel stratum deep foundation pit secant pile enclosure structure construction method, and relates to the technical field of foundation pit enclosure structures. Comprising the following steps that a guide groove is built in a construction position; the pile casing is driven into the stratum through the guide groove, and rotary excavating is conducted in the pile casing to the dense pebble bed; according to the construction sequence of the plain concrete cast-in-place piles firstly and then the reinforced concrete cast-in-place piles, enclosure walls are sequentially and alternately driven in the pile casing in the mode that the plain concrete cast-in-place piles and the reinforced concrete cast-in-place piles are meshed with each other firstly; and a top beam is built at the top of the enclosure wall body. The reinforced concrete cast-in-place piles and the plain concrete cast-in-place piles are connected into a whole in an engaged mode, so that the supporting strength of the enclosure structure is improved, the anti-seepage effect is achieved, shotcrete and anchor supporting is reduced, the foundation pit excavation exposure time is shortened, foundation pit dry groove operation is guaranteed, and the foundation pit dry groove operation efficiency is improved. Therefore, the foundation pit engineering quality and safety are ensured, the total construction period is shortened, the engineering cost is reduced, and meanwhile the ecological environment can be protected.
本发明公开了一种砂卵石地层深基坑咬合桩围护结构施工方法，涉及基坑围护结构技术领域；包括以下步骤：在施工位置筑设导向槽；将护筒经导向槽打入地层内，并在所述护筒内进行旋挖并挖至密实卵石层内；按照先素混凝土灌注桩再钢筋混凝土灌注桩的施工顺序，在所述护筒内以先素混凝土灌注桩和钢筋混凝土灌注桩相互咬合的方式依次交替打设围护墙体；在所述围护墙体顶部筑设冠梁。本发明将钢筋混凝土灌注桩与素混凝土灌注桩相互咬合连接成整体，以提高围护结构的支撑强度和起到防渗作用，减少了喷锚支护，不仅缩短了基坑开挖暴露时间，保证了基坑干槽作业，从而确保了基坑工程质量与安全、缩短了总工期、降低工程成本，同时也能够保护生态环境。
Construction method for secant pile enclosure structure of deep foundation pit in sandy gravel stratum
一种砂卵石地层深基坑咬合桩围护结构施工方法
SUN HONGTAO (author) / LIU JING (author) / ZHANG LIANG (author) / KONG MIN (author) / ZHENG ZE (author) / GAO XIANG (author) / TU YUNCHUAN (author) / XIE LIANG (author) / DONG HUIJIE (author)
2024-01-19
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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