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Multi-platform inner-support-free self-waterproof foundation pit retaining structure and construction method thereof

A technology for waterproofing foundation pits and enclosure structures, which is applied in the direction of infrastructure engineering, excavation, construction, etc., can solve the problems of poor water sealing effect of enclosure structures, unsuitable foundation pit support, and the impact of surrounding environment, so as to speed up the overall Construction speed, ease of implementation, and high safety effects

Active Publication Date: 2014-02-26
姚攀峰 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the support method for deep foundation pits is generally in the form of retaining piles plus support in the foundation pit and anchor rods. This form of support has high safety, but the site in the foundation pit is often relatively narrow, and the existence of the support in the foundation pit seriously affects The construction of the main structure has slowed down the construction progress; in addition, the deeper the foundation pit, the more complicated the surrounding soil conditions, and there are often some reinforcements that cannot be laterally stabilized by bolting. As the depth of the foundation pit increases, the pressure of groundwater increases, and the waterproofing in the foundation pit plays a decisive role in the safety and environmental impact of the foundation pit. It is easy to affect the surrounding environment, and is not suitable for foundation pit support in areas with high requirements on the construction environment, such as subways, roads, buildings, etc.

Method used

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  • Multi-platform inner-support-free self-waterproof foundation pit retaining structure and construction method thereof
  • Multi-platform inner-support-free self-waterproof foundation pit retaining structure and construction method thereof
  • Multi-platform inner-support-free self-waterproof foundation pit retaining structure and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment one sees figure 1 and figure 2 as well as Figure 5 to Figure 8 As shown, a multi-platform non-inner support self-waterproof foundation pit enclosure structure is enclosed in the soil 9 around the foundation pit, including an outer enclosure, at least one inner enclosure, and a pulley between the two The knotting device, wherein the inner enclosure is low and located at the inner ring of the foundation pit, and the outer enclosure is high and located at the outer ring of the foundation pit, forming a stepped shape with an outer height and an interior;

[0046] The outer enclosure device includes continuous high enclosure components arranged in the front row, intermittent anti-side elevation piles 14 arranged in the rear row and connecting beams 17 arranged between the tops of the two, and the high enclosure components The cap beam 3 perpendicular to the connecting beam 17 is arranged on the top of the anti-side high pile 14;

[0047]The inner enclosure de...

Embodiment 2

[0057] Embodiment two, see image 3 and Figure 4 as well as Figure 9 to Figure 12 , different from Embodiment 1, the short enclosure component is the low wall 21 of the underground diaphragm wall, the high enclosure component is the high wall 5 of the underground diaphragm wall, the high wall 5 of the underground diaphragm wall and the tie beam 7 The rigid connections are L-shaped stretched steel bars 10, L-shaped bent steel bars 18, planted bars 12 or groove-shaped bent steel bars 20, and the groove-shaped bent steel bars 20 are connected with the main bars of tie beams 7 through welds 19. The L-shaped bent steel bar 18 is connected to the main bar of the tie beam 7 through the casing 11 . An anchor rod A8 arranged obliquely from the outer enclosure to the outer soil body 9 of the foundation pit.

[0058] The construction method of the above-mentioned multi-platform non-inner support self-waterproof foundation pit enclosure structure is characterized in that the steps ar...

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Abstract

The invention relates to a multi-platform inner-support-free self-waterproof foundation pit retaining structure and a construction method thereof. The multi-platform inner-support-free self-waterproof foundation pit retaining structure comprises an outer-layer retaining device, at least one inner-layer retaining device and a pulling-connecting device between the outer-layer retaining device and the inner-layer retaining device, wherein the inner-layer retaining device is arranged at the low position and located in a foundation pit inner ring, and the outer-layer retaining device is arranged at the high position and located in a foundation pit outer ring, so that a stepped shape with high outside and low inside is formed. The outer-layer retaining device comprises a high retaining member, a lateral force resisting high pile and a connecting beam, and the inner-layer retaining device consists of a low retaining member and a back lateral force resisting low pile. The multi-platform inner-support-free self-waterproof foundation pit retaining structure adopts multiple retaining devices, the inner-layer retaining device internally supports the outer-layer retaining device while retaining the foundation pit, support arrangement in the foundation pit is omitted, the safety of the foundation pit construction is improved, and the influence of foundation pit bracing and retaining on upper-portion structure construction is avoided, multiple purposes are achieved through one structure, and the reliable and effective bracing-retaining structure and the construction method are provided for an ultra-deep foundation pit and can be widely applied to bracing and retaining of a large deep foundation pit, especially the ultra-deep foundation pit.

Description

technical field [0001] The invention relates to a foundation pit enclosure structure and a construction method thereof in building structure geotechnical engineering, in particular to a foundation pit enclosure structure without internal support and a construction method thereof. Background technique [0002] With the development of building construction technology, the application of ultra-deep foundation pits is becoming more and more extensive. How to support ultra-deep foundation pits reasonably and effectively is the technical core of foundation pit construction. At present, the support method for deep foundation pits is generally in the form of retaining piles plus support in the foundation pit and anchor rods. This form of support has high safety, but the site in the foundation pit is often relatively narrow, and the existence of the support in the foundation pit seriously affects The construction of the main structure has slowed down the construction progress; in ad...

Claims

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Application Information

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IPC IPC(8): E02D17/04
Inventor 姚攀峰徐扬
Owner 姚攀峰
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