CN107574813A - The device and construction method of Soil-rock combined ground are passed through in a kind of karst area - Google Patents

The device and construction method of Soil-rock combined ground are passed through in a kind of karst area Download PDF

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Publication number
CN107574813A
CN107574813A CN201710675765.9A CN201710675765A CN107574813A CN 107574813 A CN107574813 A CN 107574813A CN 201710675765 A CN201710675765 A CN 201710675765A CN 107574813 A CN107574813 A CN 107574813A
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China
Prior art keywords
soil
foundation
passed
grade
rock
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Pending
Application number
CN201710675765.9A
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Chinese (zh)
Inventor
沈志平
袁江文
杨振杰
朱军
孙洪
吴斌
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Guizhou Zhengye Engineering & Investment Inc Ltd
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Guizhou Zhengye Engineering & Investment Inc Ltd
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Application filed by Guizhou Zhengye Engineering & Investment Inc Ltd filed Critical Guizhou Zhengye Engineering & Investment Inc Ltd
Priority to CN201710675765.9A priority Critical patent/CN107574813A/en
Publication of CN107574813A publication Critical patent/CN107574813A/en
Pending legal-status Critical Current

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Abstract

The invention discloses the device and construction method that Soil-rock combined ground is passed through in a kind of karst area, and it includes pile foundation(1)With grade beam(2), it is characterised in that:Pile foundation(1)Positioned at non-Bedrock Region, grade beam(2)One end is fixed on pile foundation(1)Top, the other end are fixed on complete basement rock;When solving that karst area builds subgrade retaining wall by laying bricks or stones in the prior art, due to the engineering geological problems faced during foundation ground skewness.

Description

The device and construction method of Soil-rock combined ground are passed through in a kind of karst area
Technical field
The invention belongs to subgrade strengthening technical field, more particularly to a kind of karst area to pass through the device of Soil-rock combined ground And construction method.
Background technology
In recent years, as the development of Karst Mountain infrastructure construction, the highway construction in mountain area are more and more.Always with Come, due to the complexity of karst area geological conditions, the diversity of geology Crack cause, result in the inhomogeneities of foundation soil, Soil-rock combined ground becomes the common foundation form in karst area.Therefore, mountain highway foundation engineering often becomes restriction The key factor of highway development.
The characteristics of Soil-rock combined ground is that rock and soil properties are complicated, and mechanical property difference is big between ground, foundation bearing capacity phase Poor big, foundation deformation is uneven, easily causes significant relative settlement.In karst area, due to the property complicated and changeable of ground ground, When highway subgrade builds retaining wall by laying bricks or stones, such Soil-rock combined ground can be usually run into.For this kind of roadbed, such as gear is directly built by laying bricks or stones Wall, then it can bring huge potential safety hazard because of the later stage uneven subsidence of ground.Such as because of the problem again route selection, then can New manpower, material resources and financial resources are caused to increase, the suspicion for having " wasting one's talent on a petty job ", and new route selection road faces the problem of same unavoidably.Therefore, How safety, it is simple, effectively pass through such composition of rock and soil roadbed, be that karst area carries out needs during basement process to retaining wall foundation Solve the problems, such as.
The content of the invention
The technical problem to be solved in the present invention:Device and construction party that Soil-rock combined ground is passed through in a kind of karst area are provided Method, when karst area builds subgrade retaining wall by laying bricks or stones in the prior art with solution, due to what is faced during foundation ground skewness Engineering geological problems.
Technical solution of the present invention:
The device of Soil-rock combined ground is passed through in a kind of karst area, and it includes pile foundation and grade beam, and pile foundation is located at non-Bedrock Region, ground Ji Liang one end is fixed at the top of pile foundation, and the other end is fixed on complete basement rock.
Insertion stable basement rock depth in pile foundation bottom is more than or equal to 0.5 meter, and the length in soil layer is more than or equal to 3 meters.
The length that the vertical muscle of pile foundation stretches into grade beam is 0.7 meter, and the hook length for indulging muscle is 200 millimeters;The protection of reinforcing bar 50 millimeters~70 millimeters of thickness degree.
The construction method of the device of Soil-rock combined ground is passed through in a kind of described karst area, and it includes:
Caisson is being opened in step 1, the foundation trench after the excavation of non-Bedrock Region;
Steel reinforcement cage is launched in step 2, past hole stake, the height that vertical muscle elevates above the soil is 0.7 meter, 200 millimeters of hook length;
Step 3, foundation trench is cleared up and levelling;
Step 4, the structure design size for pressing grade beam and distributed steel requirement carry out formwork;
Step 5, with C25 concretings pile body and grade beam, curing concrete, the making of finishing device.
It is described that cleaning and levelling is carried out to foundation trench, make foundation trench base plane horizontal, foundation trench elevation of bottom with the top of pile foundation Absolute altitude is consistent.
Beneficial effects of the present invention:
The present invention sets grade beam to be connected with pile foundation by setting pile foundation in non-Bedrock Region on ground, by non-Bedrock Region Load is transferred in lower stabilizer basement rock, and a stake, the artificial foundation of beam composition are finally formed on Soil-rock combined ground;Solution When highway in karst area of having determined roadbed builds retaining wall by laying bricks or stones, due to foundation soil skewness, it is impossible to directly build barricade by laying bricks or stones in foundation trench When the engineering problem that faces.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention;
Fig. 2 is the pile foundation schematic cross-sectional view of the present invention.
Embodiment
The device of Soil-rock combined ground is passed through in a kind of karst area(See Fig. 1), it includes pile foundation 1 and grade beam 2, pile foundation 1 Positioned at non-Bedrock Region, the one end of grade beam 2 is fixed on the top of pile foundation 1, and the other end is fixed on complete basement rock.
In the present embodiment, a length of 10 meters, a width of 1.9 meters of the Foundation trench that need to be passed through.
Grade beam is identical with the planar dimension of barricade foundation trench;In the present embodiment, 2 wide 1.9 meters of grade beam is long 10 meters.
The insertion stable depth of basement rock 3 in the bottom of pile foundation 1 is more than or equal to 0.5 meter, and length of the pile foundation 1 in soil layer 4 is more than or equal to 3 Rice.Purpose is to through the poor soil layer of bearing capacity, allow pile foundation to fall on stable supporting course, ensure the stabilization of pile foundation Property.
The length that the vertical muscle 6 of pile foundation 1 stretches into grade beam 2 is 0.7 meter, and the hook length for indulging muscle 6 is 200 millimeters;Reinforcing bar 50 millimeters~70 millimeters of protective layer thickness.Pile foundation is set to be connected firmly with grade beam 2.
The construction method of the device of Soil-rock combined ground is passed through in a kind of described karst area, and it includes:
Caisson is opened in step 1, the foundation trench after the excavation of non-Bedrock Region;
Steel reinforcement cage is launched in step 2, past hole stake, vertical muscle 6 elevates above the soil or 0.7 meter of the height at foundation trench bottom, the milli of hook length 200 Rice;
Step 3, foundation trench is cleared up and levelling;It is described that cleaning and levelling is carried out to foundation trench, make foundation trench base plane horizontal, mark It is high consistent with the absolute altitude at the top of pile foundation 1.Debris is cleared up, it is horizontal when ensureing grade beam with being connected at the top of horizontal pile foundation, do not tilt, no Fall through, ensure the consistent of total and coordinate.
Step 4, the structure design size for pressing grade beam 2 and distributed steel requirement carry out formwork;
Step 5, with C25 concretings pile body and grade beam, curing concrete, the making of finishing device.

Claims (5)

1. the device of Soil-rock combined ground is passed through in a kind of karst area, it includes pile foundation(1)With grade beam(2), it is characterised in that: Pile foundation(1)Positioned at non-Bedrock Region, grade beam(2)One end is fixed on pile foundation(1)Top, the other end are fixed on complete basement rock.
2. the device of Soil-rock combined ground is passed through in a kind of karst area according to claim 1, it is characterised in that:Pile foundation (1)The stable basement rock of bottom insertion(3)Depth is more than or equal to 0.5 meter, in soil layer(4)In length be more than or equal to 3 meters.
3. the device of Soil-rock combined ground is passed through in a kind of karst area according to claim 1, it is characterised in that:Pile foundation (1)Vertical muscle(6)Stretch into grade beam(2)Length be 0.7 meter, indulge muscle(6)Hook length be 200 millimeters;The protection of reinforcing bar 50 millimeters~70 millimeters of thickness degree.
4. the construction method of the device of Soil-rock combined ground is passed through in a kind of karst area as claimed in claim 3, it includes:
Caisson is being opened in step 1, the foundation trench after the excavation of non-Bedrock Region;
Steel reinforcement cage is launched in step 2, past hole stake, indulges muscle(6)The height to elevate above the soil is 0.7 meter, 200 millimeters of hook length;
Step 3, foundation trench is cleared up and levelling;
Step 4, press grade beam(2)Structure design size and distributed steel requirement carry out formwork;
Step 5, with C25 concretings pile body and grade beam, curing concrete, the making of finishing device.
5. the construction method of the device of Soil-rock combined ground, its feature are passed through in a kind of karst area according to claim 4 It is:It is described that cleaning and levelling is carried out to foundation trench, make foundation trench base plane horizontal, foundation trench elevation of bottom and pile foundation(1)Top Absolute altitude is consistent.
CN201710675765.9A 2017-08-09 2017-08-09 The device and construction method of Soil-rock combined ground are passed through in a kind of karst area Pending CN107574813A (en)

Priority Applications (1)

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CN201710675765.9A CN107574813A (en) 2017-08-09 2017-08-09 The device and construction method of Soil-rock combined ground are passed through in a kind of karst area

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710675765.9A CN107574813A (en) 2017-08-09 2017-08-09 The device and construction method of Soil-rock combined ground are passed through in a kind of karst area

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CN107574813A true CN107574813A (en) 2018-01-12

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201089942Y (en) * 2007-09-30 2008-07-23 中铁二院工程集团有限责任公司 Declivity flabbiness foundation embankment construction
JP2009209574A (en) * 2008-03-04 2009-09-17 Ihi Corp Erection method and erection structure of bridge
CN101565940A (en) * 2009-05-12 2009-10-28 中国水电顾问集团华东勘测设计研究院 Coupling structure of gravity dam and unfavorable geological bank slope and the construction method thereof
CN201962558U (en) * 2011-03-21 2011-09-07 中铁二院工程集团有限责任公司 High-steepness side slope subgrade structure for mountainous area
CN102425082A (en) * 2011-09-09 2012-04-25 中铁二院工程集团有限责任公司 Subgrade strengthening structure for highly karstified station turnout zone on high-speed railway
CN102953341A (en) * 2012-12-13 2013-03-06 中铁上海工程局有限公司 Overhead trestle structure built on non-covering steep bare rocks in deep rapids
CN104047222A (en) * 2013-03-14 2014-09-17 上海市政工程设计研究总院(集团)有限公司 Bridge structure near mountain and by river and construction method of bridge
CN105804097A (en) * 2016-03-28 2016-07-27 上海市政工程设计研究总院(集团)有限公司 Cantilever structure way for treating landslides in cooperation with h-shaped anti-sliding piles and construction method of cantilever structure way

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201089942Y (en) * 2007-09-30 2008-07-23 中铁二院工程集团有限责任公司 Declivity flabbiness foundation embankment construction
JP2009209574A (en) * 2008-03-04 2009-09-17 Ihi Corp Erection method and erection structure of bridge
CN101565940A (en) * 2009-05-12 2009-10-28 中国水电顾问集团华东勘测设计研究院 Coupling structure of gravity dam and unfavorable geological bank slope and the construction method thereof
CN201962558U (en) * 2011-03-21 2011-09-07 中铁二院工程集团有限责任公司 High-steepness side slope subgrade structure for mountainous area
CN102425082A (en) * 2011-09-09 2012-04-25 中铁二院工程集团有限责任公司 Subgrade strengthening structure for highly karstified station turnout zone on high-speed railway
CN102953341A (en) * 2012-12-13 2013-03-06 中铁上海工程局有限公司 Overhead trestle structure built on non-covering steep bare rocks in deep rapids
CN104047222A (en) * 2013-03-14 2014-09-17 上海市政工程设计研究总院(集团)有限公司 Bridge structure near mountain and by river and construction method of bridge
CN105804097A (en) * 2016-03-28 2016-07-27 上海市政工程设计研究总院(集团)有限公司 Cantilever structure way for treating landslides in cooperation with h-shaped anti-sliding piles and construction method of cantilever structure way

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Application publication date: 20180112

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