CN1206763A - Weak foundation treatment technological method - Google Patents
Weak foundation treatment technological method Download PDFInfo
- Publication number
- CN1206763A CN1206763A CN 97109178 CN97109178A CN1206763A CN 1206763 A CN1206763 A CN 1206763A CN 97109178 CN97109178 CN 97109178 CN 97109178 A CN97109178 A CN 97109178A CN 1206763 A CN1206763 A CN 1206763A
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- China
- Prior art keywords
- weak
- foundation
- horsestone
- stone
- earth
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The technological process for weak ground treatment includes the following steps: filling more than 1 m of earth intercalated with stone upwards from original ground level on the weak ground with each layer by 30 cm; using road roller of 16 tons to make compaction; its foundation is 1.5-2 times wider than standard design; it has no need of trenching, only building the foundation on the fill of earth interealated with stone; the filled earth with stone must be widened to 4m beyond the external wal surface. Said invention is simple and easy, can make rapid construction, and its reliability is high.
Description
The present invention relates to build class, is a kind of process of handling weak ground.
Weak ground mainly refers to the ground that compression layer is made of weak soil property, mud soil property etc., the lower soil property of modulus of compressibility in other words.Running into weak ground at present is a problem of relatively having a headache.The building below ten layers particularly.Shortcomings such as common practices is to deep-cut the ground foundation trench at present, drives piles, and is long in time limit, that investment is big, engineering quantity is big.
The objective of the invention is to provide a kind of reduced investment, short, effective Weak foundation treatment technological method of duration.
Concrete scheme of the present invention is: upwards filling out native horsestone more than one meter from the original place absolute altitude on the weak ground, per 30 centimeters one decks, use the road roller more than 16 tons to carry out compacting, the lower margin basis than the wide 1.5-2 of type design doubly, and do not dig foundation trench and footing is done in the last horsestone that bankets, beyond the native horsestone that is filled should go out four meters than exterior wall skin is wide.
Below the present invention is carried out mechanical analysis:
Ask the distortion Si of each layer, try to achieve with simple compression formula:
In the formula, P
I-1--be the additonal pressure at this (i) layer end face place; P
i--be the additonal pressure at place, this (i) layer bottom surface, kg/cm
2h
i--the thickness of this layer soil, cm; E
i--the modulus in compression of this layer soil, kg/cm
2
Can know from 1 formula and to find out deformation values and P
I-1+ P
iHalf of sum is directly proportional.If P
I-1More little P
iJust more little, (P
I-1+ P
i) 2 of ÷ are more little.Work as h
iBe one regularly take advantage of long-pending also little.With E
iBe inversely proportional to treated ground E
iValue improves greatly, thus calculate S
iAlso very little.General tylophora florlbunda civilian construction nearly weigh 21 tons for every meter, adopt sound stage width 3.5
M, improve E
iThe way of value is calculated to such an extent that the total deformation value is also all very little at last.
Because 21000kg/35000cm
2=O.6kg/cm
2, deduct the gravity pressure P of foundation bed place soil again
o(1M * 1.8
T/ M
3=1.8
T/ M
2), foundation bed place additonal pressure equals (0.6～0.18=0.42kg/cm like this
2) 0.42kg/cm
2, compression depth is also very shallow.Again from formula
Analyze.
S---basic final settlement
The foundation deformation value that S '---building layerwise summation method calculates
m
s---the settlement calculation empirical coefficient
Soil layer number in n---the ground compression layer scope
p
o---the additonal pressure (kg/cm at foundation bed place
2)
E
Si---the modulus of compressibility (kg/cm of i layer soil under the foundation bed
2)
Z
i, Z
I-1---be the distance (cm) of foundation bed to the i layer and i-1 layer bottom surface
C
i, C
I-1---be foundation bed calculation level to the i layer and i-1 layer bottom surface scope
Interior average additonal pressure coefficient.
The settlement calculation empirical coefficient
| Compression modulus Es (kg/cm 2) | Es<=40 | ?40<Es<=70 | ?70<Es<=150 | ?150<Es<=200 | ?Es>200 |
| Settlement calculation empirical coefficient Ms | 1．3 | 1．0 | 0．7 | 0．5 | 0．2 |
Through the soil property of spreading, upwards fill the soil property of layering spreading, or cut out the soil property of a part of backfill layering spreading, E
sValue all improves greatly, m
sAlso littler than 0.2.Still be example P with the tylophora florlbunda
o=0.42kg/cm
2, compression depth is also very shallow, E
SiWeighted average also very big, calculate to such an extent that the S value is also very little at last.
Promptly adopting present technique basis final settlement very little, is the process of the weak ground of a kind of effective processing.
Reliability height of the present invention, operation is few, and method is simple and easy, and construction is fast, and reduced investment has remarkable economic efficiency and social benefit.
The utility model will be further described below in conjunction with accompanying drawing:
Accompanying drawing is the based process schematic diagram of our unit's one dormitory building.
Embodiment: use the present invention to handle our unit one dormitory building basis, this building is built on the rice field, the ground weakness, and processing method is: at first smooth spreading rice field, the modulus of compressibility of raising soil property; Upwards fill the native horsestone 2 about a meter, and carry out spreading by 30 centimeters one decks, (using 18 tons of road rollers) builds among native horsestone 2 (lower floor on this lower margin basis is wideer 1.5 times than common design standard) with lower margin basis 1, on the main folder stone 2 filled out should be wideer about 4 meters than the exterior wall on lower margin basis 1.The last test modulus of resilience, requirement reaches the standard of highway subgrade.
Claims (1)
1. be used for a kind of Weak foundation treatment technological method in the building construction, it is characterized in that: upwards filling out native horsestone more than one meter from the original place absolute altitude on the weak ground, per 30 centimeters one decks, use the road roller more than 16 tons to carry out compacting, the lower margin basis than the wide 1.5-2 of type design doubly, and do not dig foundation trench and footing is done in the last horsestone that bankets, beyond the native horsestone that is filled should go out four meters than exterior wall skin is wide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97109178 CN1206763A (en) | 1997-07-24 | 1997-07-24 | Weak foundation treatment technological method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97109178 CN1206763A (en) | 1997-07-24 | 1997-07-24 | Weak foundation treatment technological method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1206763A true CN1206763A (en) | 1999-02-03 |
Family
ID=5170989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97109178 Pending CN1206763A (en) | 1997-07-24 | 1997-07-24 | Weak foundation treatment technological method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1206763A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2747744C2 (en) * | 2019-08-14 | 2021-05-13 | Федеральное государственное бюджетное учреждение "Центральный научно-исследовательский и проектный институт Министерства строительства и жилищно-коммунального хозяйства Российской Федерации"(ФГБУ "ЦНИИП Минстроя России") | Method for strengthening low-strength water-saturated soils of base of tape foundation and device for its implementation |
-
1997
- 1997-07-24 CN CN 97109178 patent/CN1206763A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2747744C2 (en) * | 2019-08-14 | 2021-05-13 | Федеральное государственное бюджетное учреждение "Центральный научно-исследовательский и проектный институт Министерства строительства и жилищно-коммунального хозяйства Российской Федерации"(ФГБУ "ЦНИИП Минстроя России") | Method for strengthening low-strength water-saturated soils of base of tape foundation and device for its implementation |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |