Steel sleeve wall protecting device and construction method of cast-in-place pile in sandy gravel rock area

A construction method and technology of steel sleeves, applied in drilling equipment and methods, casings, sheet pile walls, etc., can solve problems such as pressure imbalance, reduce loss, ensure verticality, and increase vertical bearing capacity Effect

Active Publication Date: 2021-12-24
安徽建工路港建设集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Secondly, aiming at the problem of unbalanced pressure inside and outside the outer steel sleeve, and the problem that the inner steel sheath fell into the bottom plate of the karst cave during the construction and sinking of the inner steel sheath in the karst area, a solution to improve the subsidence of the inner steel sheath was provided. The anti-overturning ability when reaching the cave, and the device that prevents the tilting phenomenon of the hole position when the inner steel sheath sinks into the cave

Method used

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  • Steel sleeve wall protecting device and construction method of cast-in-place pile in sandy gravel rock area
  • Steel sleeve wall protecting device and construction method of cast-in-place pile in sandy gravel rock area
  • Steel sleeve wall protecting device and construction method of cast-in-place pile in sandy gravel rock area

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] See figure 1 , a steel sleeve wall protection device, comprising an outer sleeve mechanism, an inner sleeve mechanism, an inner sleeve connector 11 and an outer sleeve connector 21, the outer sleeve mechanism includes two or more outer steel sleeves fixedly connected in sequence Sleeve 22, the inner sleeve mechanism includes more than two internal steel sleeves 12 fixedly connected in sequence;

[0047] The outer wall of each section of the inner steel sleeve 12 is evenly arranged with an axial strip-shaped plate 13, and the inner wall of each section of the outer steel sleeve 22 is evenly equipped with an axial long groove 23, and the strip-shaped plate 13 can be slidably fitted. Set in the long groove 23, so that the inner sleeve mechanism coaxially slides in the outer steel sleeve mechanism;

[0048] Holes are uniformly opened on the wall of each outer steel sleeve 22;

[0049] The bottom end of the outer steel sleeve 22 located at the bottom of the outer sleeve me...

Embodiment 2

[0058] The present invention also includes a construction method for cast-in-situ piles in sand and pebble rock areas. The construction method adopts the above-mentioned steel sleeve wall protection device. The outer steel sleeve 22 is rolled by Q345 steel plate and processed by cast steel hot rolling. The inner diameter of the sleeve 22 is 10-20 cm larger than the pile diameter. When the pile diameter is 160 cm, the inner diameter of the outer steel sleeve 22 is 173 cm, and the outer diameter is 175 cm.

[0059] The inner steel sleeve 12 is coiled with Q345 steel plate and hot-rolled by cast steel. The inner diameter of the inner steel sleeve 12 is 5-10 cm larger than the pile diameter. When the pile diameter is 160 cm, the inner diameter of the inner steel sleeve 12 is 165 cm. , the outer diameter of the cylinder is 168cm;

[0060] The length of each outer steel sleeve 22 or inner steel sleeve 12 is 3 m.

[0061] Described construction method specifically comprises the foll...

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Abstract

The invention relates to the field of karst area pile foundation construction, in particular to a steel sleeve wall protecting device and a construction method of a cast-in-place pile in a sandy gravel rock area. The steel sleeve wall protecting device comprises an outer sleeve mechanism, an inner sleeve mechanism, an inner sleeve connector and an outer sleeve connector, the outer sleeve mechanism comprises more than two sections of outer steel sleeves which are fixedly connected in sequence, and the inner sleeve mechanism comprises more than two sections of inner steel sleeves which are fixedly connected in sequence; axial long-strip-shaped plates are evenly distributed on the outer wall of each section of inner steel sleeve, axial long grooves are evenly distributed in the inner wall of each section of outer steel sleeve, the long-strip-shaped plates are arranged in the long grooves in a sliding fit mode, so that the inner sleeve mechanism coaxially slides in an outer steel sleeve mechanism; holes are uniformly formed in the sleeve wall of each section of outer steel sleeve; the steel sleeve protection wall device is used in the construction method of the cast-in-place pile in the sandy gravel rock area, the anti-overturning capacity of the inner steel sleeve when the inner steel sleeve sinks to a karst cave is improved, and the phenomenon of hole position inclination when the inner steel sleeve sinks to the karst cave is prevented.

Description

technical field [0001] The invention relates to the field of pile foundation construction in karst areas, in particular to a steel sleeve wall protection device and a construction method for cast-in-place piles in sandy pebble rock areas. Background technique [0002] Karst refers to a series of geological and landform phenomena formed by the dissolution of soluble carbonate rocks, sulfate rocks, gypsum, etc., by groundwater and surface water. The sandy pebble formation is a typical mechanically unstable formation with loose structure, large porosity and low cohesion. In the construction of bridge engineering, lava geology of sandy pebble layer is often encountered. The construction of bored pile foundation is the most commonly used and most common construction technology in the engineering construction of bridges in sandy pebble layer karst areas. [0003] When the percussion drill passes through the sand and pebble layer and enters the rock, the percussion drill will gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/68E02D5/38E21B17/00E21B17/08E21B7/00E21B7/20
CPCE02D5/68E02D5/385E21B17/00E21B17/08E21B7/00E21B7/20E02D2250/0023
Inventor 钱叶琳汪亦显姜南李娴张辉袁海平钟剑苏颖刘春梅左小晗
Owner 安徽建工路港建设集团有限公司
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