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Fabricated embedded foundation pit retaining pile and pile wall integrated structure and construction method thereof

A technology of foundation pit enclosure and construction method, which is applied in foundation structure engineering, sheet pile wall, excavation, etc., can solve the difficulties of sheet pile transportation, hoisting and installation, unreasonable stress on the section of pile row structure, long construction period, etc. problems, to achieve the effect of good project implementation, high operation efficiency and reduced project cost

Inactive Publication Date: 2019-08-16
王琪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The technical problem to be solved by the present invention is to provide a new type of assembled implanted sheet pile by overcoming the shortcomings of the existing pile row structure such as unreasonable force on the section, long construction period, high cost, and difficulty in sheet pile transportation, hoisting and installation. Envelope structure and its construction method

Method used

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  • Fabricated embedded foundation pit retaining pile and pile wall integrated structure and construction method thereof
  • Fabricated embedded foundation pit retaining pile and pile wall integrated structure and construction method thereof
  • Fabricated embedded foundation pit retaining pile and pile wall integrated structure and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0053] Example 1: Prefabricated sheet piles are used as a part of the basement wall in a pile-wall-integrated basement structure

[0054] From figure 1 It can be seen that the foundation pit enclosure structure assembled by the prefabricated sheet pile 1 and the crown beam 4 is used as a part of the outer wall of the basement, and there are pre-embedded steel bar connecting sleeves 25 at different positions of the prefabricated sheet pile 1 to realize the connection with the foundation pit. The steel bar of the bottom plate 52 of the basement and the steel bar in the lining wall 5 are connected as a whole. After the rock-soil body 3 in the foundation pit is excavated, the solidified soil body 33 inside the prefabricated sheet pile 1 and the rock-soil body 3 between the sheet piles are removed, and filled up with cement mortar; hole 25, and link to each other with the reinforcing bars in basement floor 52 steel bars, lining wall 5 and basement roof 53; , the inner lining wall...

example 2

[0055] Example 2. The implantation of prefabricated sheet piles and the method of extending them along the axial direction

[0056] image 3 The installation base 6 shown as the implantation of the prefabricated sheet pile is composed of the lower section pile clamp 61, the upper section pile clamp 62, the axial pressure device 63, the crane 64, the vibration hammer 65 and the like. From image 3 It can be seen from the figure that in the pre-formed hole 31 or the pre-formed groove 32, the fluid self-setting solidified soil 33 is filled, and the installation base 6 is assembled to the position where the sheet pile 1 is implanted, and the first section of the sheet pile 1 is formed by The crane 64 is hoisted into the upper and lower clamps 61 and 62 of the pedestal 6, and its verticality and position are adjusted through the clamps to ensure that the verticality of the sheet pile 1 is not less than 1 / 300. With the aid of the axial pressing device 63 on the top, the sheet pile...

example 3

[0058] Example 3. Pre-drilled holes (grooves) implanted into sheet piles and soil retaining methods between piles

[0059] Insert the prefabricated sheet pile 1 into the position of the retaining pile of the foundation pit. When the rock and soil mass is relatively hard, a prefabricated hole 31 is required. The diameter of the hole is larger than the maximum size of the prefabricated sheet pile 1 and placed outside 50mm. After the excavation is in place, Stir the mud and dregs in the hole evenly with cement slurry. On the one hand, in order to support the wall of the hole, on the other hand, the solidified soil 33 is formed. The sheet piles 1 implanted in the pre-opening holes 31 mainly include: hollow T-shaped prefabricated sheet piles 11. H-type sheet pile 15 and hollow rectangular plate 18, such as Figure 4 , 5 and 6.

[0060] For different section types of sheet piles 1, different types of holes 41 are reserved in the used crown beam 4, such as Figure 7 , 8 and 9.

...

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Abstract

The invention discloses a fabricated embedded foundation pit retaining pile and pile wall integrated structure and a construction method thereof. Sheet piles are composed of prefabricated reinforced concrete sheet piles and steel H-piles. The prefabricated sheet piles are prestressed high-strength reinforced concrete members, and cross sections are divided into a hollow T shape, a rectangle and anH shape. Each prefabricated sheet pile has the maximum length of 15 meters and the width of not more than 2.5 meters. Equal-strength mechanical connection joints of each steel bar are adopted in thesheet piles in the axial direction-extension; the prefabricated sheet piles are used as external walls of underground structures to bear stratum pressure and are combined with lining walls to form theexternal walls of the underground structures. The sheet piles are implanted into the stratum at certain intervals and fabricated into discrete type row pile enclosure structures. A sheet pile body with U-shaped grooves in both sides is inserted between every two sheet piles and fabricated into continuous wall type enclosure structures which are engaged with each other. The foundation pit enclosure structure fabricated in this way has the social values of green, environmental protection, safety and reliability, the construction cost can be reduced, and the construction period is shortened meanwhile, and great economic value is achieved.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a pile row, which is assembled into a deep foundation pit enclosure structure through an implantation method and used as a basement exterior wall. Background technique [0002] The pile row or diaphragm wall enclosure structure in the foundation pit engineering is mainly cast-in-place concrete piles and underwater concrete pouring diaphragm walls. Cast-in-place concrete enclosure structures have been widely used in underground space construction. Due to the large amount of mud produced in the hole, groove and retaining wall, the instability of the hole wall and groove wall, and the difficulty in guaranteeing the quality of underwater concrete pouring, the damage to the safety and environment of the foundation pit has become more and more serious. [0003] The cast-in-place piles are used as the retaining pile structure for deep foundation pits, and are widely used in v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04E02D5/28E02D5/10E02D5/20
CPCE02D5/10E02D5/20E02D5/28E02D17/04
Inventor 王琪
Owner 王琪
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