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A platform for research: civil engineering, architecture and urbanism
Foundation pit supporting structure of deep and thick sludge stratum and construction method of foundation pit supporting structure
The invention provides a foundation pit supporting structure of a deep and thick sludge stratum and a construction method of the foundation pit supporting structure. The foundation pit supporting structure comprises cast-in-situ bored piles arranged in rows and a waterproof curtain. The waterproof curtain comprises a plurality of jet grouting piles located on a sludge layer and an upper stratum of the sludge layer and a plurality of swing grouting piles located on a lower stratum of the sludge layer. The cast-in-situ bored pile is constructed by adopting a rotary drilling rig; the adjacent jet grouting piles are in lap joint and meshed, the adjacent swing grouting piles are in lap joint and meshed, and the adjacent cast-in-situ bored piles are not meshed. The construction of the waterproof curtain and the construction of the cast-in-situ bored piles are combined, the jet grouting piles of the waterproof curtain are constructed firstly, the jet grouting piles are in lap joint and meshed with one another, then the cast-in-situ bored piles are constructed in the jet grouting piles through a rotary drilling rig, the diameter of the jet grouting piles is larger than that of the cast-in-situ bored piles, and the jet grouting piles serve as the waterproof curtain while the jet grouting piles serve as the waterproof curtain. The pile is dual-purpose, the construction procedures are reduced, the construction cost is reduced, and the pile has better popularization value.
本发明提供了一种深厚淤泥地层的基坑支护结构及其施工方法。基坑支护结构包括呈排状布置的钻孔灌注桩以及止水帷幕。止水帷幕包括位于淤泥层及其上部地层的若干旋喷桩以及位于淤泥层下部地层的若干摆喷桩。钻孔灌注桩采用旋挖钻机施工；相邻的旋喷桩之间搭接咬合，相邻的摆喷桩之间搭接咬合，相邻的钻孔灌注桩之间不咬合。本发明将止水帷幕与钻孔灌注桩的施工相结合，先行施工止水帷幕的旋喷桩，并将旋喷桩相互搭接咬合，然后在旋喷桩内采用旋挖钻机施工钻孔灌注桩，旋喷桩桩径大于钻孔灌注桩桩径，前者作为止水帷幕的同时，还是后者施工期间的临时护筒，一桩两用，减少了施工工序，降低了工程造价，具有较佳的推广价值。
Foundation pit supporting structure of deep and thick sludge stratum and construction method of foundation pit supporting structure
The invention provides a foundation pit supporting structure of a deep and thick sludge stratum and a construction method of the foundation pit supporting structure. The foundation pit supporting structure comprises cast-in-situ bored piles arranged in rows and a waterproof curtain. The waterproof curtain comprises a plurality of jet grouting piles located on a sludge layer and an upper stratum of the sludge layer and a plurality of swing grouting piles located on a lower stratum of the sludge layer. The cast-in-situ bored pile is constructed by adopting a rotary drilling rig; the adjacent jet grouting piles are in lap joint and meshed, the adjacent swing grouting piles are in lap joint and meshed, and the adjacent cast-in-situ bored piles are not meshed. The construction of the waterproof curtain and the construction of the cast-in-situ bored piles are combined, the jet grouting piles of the waterproof curtain are constructed firstly, the jet grouting piles are in lap joint and meshed with one another, then the cast-in-situ bored piles are constructed in the jet grouting piles through a rotary drilling rig, the diameter of the jet grouting piles is larger than that of the cast-in-situ bored piles, and the jet grouting piles serve as the waterproof curtain while the jet grouting piles serve as the waterproof curtain. The pile is dual-purpose, the construction procedures are reduced, the construction cost is reduced, and the pile has better popularization value.
本发明提供了一种深厚淤泥地层的基坑支护结构及其施工方法。基坑支护结构包括呈排状布置的钻孔灌注桩以及止水帷幕。止水帷幕包括位于淤泥层及其上部地层的若干旋喷桩以及位于淤泥层下部地层的若干摆喷桩。钻孔灌注桩采用旋挖钻机施工；相邻的旋喷桩之间搭接咬合，相邻的摆喷桩之间搭接咬合，相邻的钻孔灌注桩之间不咬合。本发明将止水帷幕与钻孔灌注桩的施工相结合，先行施工止水帷幕的旋喷桩，并将旋喷桩相互搭接咬合，然后在旋喷桩内采用旋挖钻机施工钻孔灌注桩，旋喷桩桩径大于钻孔灌注桩桩径，前者作为止水帷幕的同时，还是后者施工期间的临时护筒，一桩两用，减少了施工工序，降低了工程造价，具有较佳的推广价值。
Foundation pit supporting structure of deep and thick sludge stratum and construction method of foundation pit supporting structure
一种深厚淤泥地层的基坑支护结构及其施工方法
ZHU JUN (author) / CAO SHIDING (author) / WANG ZHIXIN (author)
2023-10-10
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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