A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Backfill area foundation pit supporting structure and construction method thereof
The invention relates to a construction method of a backfill area foundation pit supporting structure. The construction method comprises the following steps: S1, constructing slope protection piles and top beams; S2, constructing a plurality of pairs of profile steel cement soil mixing piles on the sides, away from a foundation pit to be excavated, of the slope protection piles, wherein each pairof profile steel cement soil mixing piles are arranged at intervals, the multiple pairs of profile steel cement soil mixing piles are connected into a whole through cross beams, and the cross beams are connected with the top beams of the supporting piles in a pulled mode; S3, excavating the foundation pit in a layered mode, and then carrying out anchor rod construction on the side wall of the foundation pit, wherein the tail ends of the anchor rods penetrate through the space between each pair of profile steel cement soil mixing piles, grouting is carried out in anchor rod holes, sectional grouting is adopted, and expanded heads are formed at the ends, extending out of the profile steel cement soil mixing piles, of the anchor rods; and S4, carrying out waist beam construction, and carryingout excavation of a foundation pit of the next layer. The profile steel cement soil mixing piles are arranged behind the slope protection piles, the pulling and fixing effects on the slope protectionpiles are achieved, meanwhile, anchor rod grouting bodies are matched with the profile steel cement soil mixing piles to increase the pulling resistance of the anchor rods, and therefore the stability of pile-anchor supporting is improved.
本发明涉及一种回填区基坑支护结构施工方法，包括以下步骤：S1、施工护坡桩以及冠梁；S2、在护坡桩远离待开挖基坑的一侧施工多对型钢水泥土搅拌桩，每对型钢水泥土搅拌桩间隔设置，多对型钢水泥土搅拌桩用横梁连接为整体，并将横梁和支护桩的冠梁拉接。S3、分层开挖基坑，然后在基坑侧壁上进行锚杆施工，锚杆的尾端穿过每对型钢水泥土搅拌桩之间，向锚杆孔内注浆，采用分段注浆，在锚杆伸出型钢水泥土搅拌桩的一端形成扩大头。S4、腰梁施工，进行下一层基坑开挖。通过在护坡桩后设置型钢水泥土搅拌桩，对护坡桩具有拉接固定的作用，同时锚杆注浆体与型钢水泥土搅拌桩配合增加锚杆的抗拔能力，从而提高桩锚支护的稳定性。
Backfill area foundation pit supporting structure and construction method thereof
The invention relates to a construction method of a backfill area foundation pit supporting structure. The construction method comprises the following steps: S1, constructing slope protection piles and top beams; S2, constructing a plurality of pairs of profile steel cement soil mixing piles on the sides, away from a foundation pit to be excavated, of the slope protection piles, wherein each pairof profile steel cement soil mixing piles are arranged at intervals, the multiple pairs of profile steel cement soil mixing piles are connected into a whole through cross beams, and the cross beams are connected with the top beams of the supporting piles in a pulled mode; S3, excavating the foundation pit in a layered mode, and then carrying out anchor rod construction on the side wall of the foundation pit, wherein the tail ends of the anchor rods penetrate through the space between each pair of profile steel cement soil mixing piles, grouting is carried out in anchor rod holes, sectional grouting is adopted, and expanded heads are formed at the ends, extending out of the profile steel cement soil mixing piles, of the anchor rods; and S4, carrying out waist beam construction, and carryingout excavation of a foundation pit of the next layer. The profile steel cement soil mixing piles are arranged behind the slope protection piles, the pulling and fixing effects on the slope protectionpiles are achieved, meanwhile, anchor rod grouting bodies are matched with the profile steel cement soil mixing piles to increase the pulling resistance of the anchor rods, and therefore the stability of pile-anchor supporting is improved.
本发明涉及一种回填区基坑支护结构施工方法，包括以下步骤：S1、施工护坡桩以及冠梁；S2、在护坡桩远离待开挖基坑的一侧施工多对型钢水泥土搅拌桩，每对型钢水泥土搅拌桩间隔设置，多对型钢水泥土搅拌桩用横梁连接为整体，并将横梁和支护桩的冠梁拉接。S3、分层开挖基坑，然后在基坑侧壁上进行锚杆施工，锚杆的尾端穿过每对型钢水泥土搅拌桩之间，向锚杆孔内注浆，采用分段注浆，在锚杆伸出型钢水泥土搅拌桩的一端形成扩大头。S4、腰梁施工，进行下一层基坑开挖。通过在护坡桩后设置型钢水泥土搅拌桩，对护坡桩具有拉接固定的作用，同时锚杆注浆体与型钢水泥土搅拌桩配合增加锚杆的抗拔能力，从而提高桩锚支护的稳定性。
Backfill area foundation pit supporting structure and construction method thereof
一种回填区基坑支护结构及其施工方法
SHEN YUANHONG (author)
2020-08-21
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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