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Ultrahigh ultra-large open caisson and construction method

A construction method and caisson technology, applied in caisson, infrastructure engineering, construction and other directions, can solve the problems of foundation pit collapse, high cost, long construction period, etc., to save construction period and construction cost, promote value, avoid foundation The effect of pit collapse

Pending Publication Date: 2017-12-08
NO 2 CONSTR GRP CO LTD OF SHANGHAI CONSTR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method suitable for super-high and large caissons and its construction method, so as to solve the problem of high cost of enclosure and long construction period in the existing foundation pit construction, and there is a certain risk of foundation pit collapse

Method used

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Embodiment 1

[0029] Combine below figure 1 with figure 2 The construction method of the super high caisson of the present invention will be described in detail.

[0030] The construction method of the super high caisson includes the following steps:

[0031] Step 1. Construction water-stop curtain 3: Double rows of high-pressure jet grouting piles with a diameter of 800mm are used as the water-stop curtain around the caisson, and the lap height is ≥ 250mm, so as to prepare for the caisson construction.

[0032] Step 2: Construct the back cover 8 with compaction grouting. The thickness of the grout is 3m below the concrete bottom plate of the caisson, so as to isolate the sand and water at the bottom of the well, and further prepare for the subsequent cast-in-place caisson.

[0033] Step 3. Since the caisson is fabricated on-site, after the construction of the water-stop curtain 3 and the compacted grouting bottom cover 8 is completed, the foundation is cleaned and leveled, and a cushion...

Embodiment 2

[0050] Please continue to refer figure 1 with figure 2 , this embodiment also provides a super high caisson manufactured by the aforementioned construction method. The super high caisson is cast on site. The super high caisson includes a top cover, caisson structure and bottom cover. The caisson structure includes the first caisson 4 and the second caisson which are poured vertically The caisson 5 is provided with a blade foot 6 at the lower end of the caisson structure, a partition wall is arranged in the shaft of the caisson, and a groove is arranged on the inner side of the well wall above the blade foot 6 .

[0051] To sum up, the super-high caisson and construction method of the present invention saves the horizontal support system and avoids the risk of foundation pit collapse through "making twice, caisson once". It eliminates the risk in the process of making a super-high caisson, saves the construction period and construction cost, and has a good promotion value. ...

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Abstract

The invention discloses an ultrahigh ultra-large open caisson and a construction method, and belongs to the technical field of municipal drainage, and aims to solve the problem that certain foundation pit collapse risk exists as an existing enclosure form of foundation pit construction is relatively high in cost and is long in construction period. The construction method for the ultrahigh ultra-large open caisson comprises the following steps of: firstly, arranging a waterproof curtain, a compaction grouting substrate and a cushion layer as preparatory measures, separately casting a first section of the open caisson and a second section of the open caisson in two steps until a complete open caisson structure is completed; then, performing open caisson construction; and finally, performing substrate concrete pouring. Through the construction method of manufacturing twice and performing open caisson construction once, a horizontal supporting system is saved, so that the foundation pit collapse risk is avoided; the open caisson is separately manufactured through two steps, so that the risk of a manufacturing process of manufacturing the ultrahigh ultra-large open caisson once is avoided, the construction period is shortened, and construction cost is reduced, and therefore, the popularization value is relatively high.

Description

technical field [0001] The invention belongs to the technical field of municipal drainage, and in particular relates to a super-high caisson and a construction method. Background technique [0002] At present, with the rapid development of social economy and the continuous improvement of urban construction requirements, the construction of rainwater and sewage systems is becoming more and more important. The traditional foundation pit construction mainly adopts the construction method of large-scale excavation combined with several horizontal support systems. The construction method is mostly in the form of underground diaphragm walls, cast-in-place piles, and SMW piles. The above-mentioned enclosure forms have high cost and long construction period, and there is a certain risk of foundation pit collapse. As a safe and reliable rain and sewage collection device, the caisson has the advantages of good compactness, short construction period, relatively small impact on adjacen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D23/00E02D23/08E02D23/16
CPCE02D23/00E02D23/08E02D23/16
Inventor 郭延义鲍炯赵欣
Owner NO 2 CONSTR GRP CO LTD OF SHANGHAI CONSTR GRP
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