temporary excavation support system for a new railway bridge and highway underpass in pittsburgh,...

8/3/2019 Temporary Excavation Support System for a New Railway Bridge and Highway Underpass in Pittsburgh, Pennsylvania by Andrew G. Cushing and Christopher

1/8

XKDZAPBPS K_NBWBXCAE ^[ZZAPX ^S^XKD GAP B EKV PBCIVBS@PCHFK BEH OCFOVBS [EHKPZB^^ CE ZCXX^@[PFO

Behpkv F% N{~ocef2) Dkd`kp) B^NK behNopc~xazokp L% Ikvc~0) Z%K%) Dkd`kp) B^NK

B@^XPBNX< [exci pknkexis) xpbggcn kcxcef Zcxx~`{pfo va{ih {~k xok Vk~x Keh

@pchfk xa npa~~ xok Aoca Pcwkp aeis xa `knadk kexbefikh ce xok Vk~x Keh Ncpnik)vocno nae~c~xkh ag xva pbcivbs awkpzb~~k~ kbno a{x$ag$bicfedkex vcxo xok Vk~x Keh@pchfk% B pabhvbs cdzpawkdkex zpalknx cewaiwcef xok nae~xp{nxcae ag b ekv pbcivbs

`pchfk beh ocfovbs {ehkpzb~~ vb~ {ehkpxbmke xa kicdcebxk xoc~ xpbggcn ncpnik behzpawchk b hcpknx naeeknxcae `kxvkke xok Vk~x Keh @pchfk beh ^xbxk Pa{xk 23%@pbsdbe Nae~xp{nxcae Napzapbxcae ob~ ~cenk nadzikxkh xoc~ zpalknx%

Xoc~ zbzkp zpawchk~ b ~{ddbps ag xok hk~cfe beh nae~xp{nxcae ~kr{kencef ag b

xkdzapbps ~okkx zcik knbwbxcae ~{zzapx ~s~xkd xobx vb~ nae~xp{nxkh xa gbncicxbxk xoknadzikxcae ag xoc~ zpalknx% Xok knbwbxcae ~{zzapx ~s~xkd nae~c~xkh ag azza~cef~okkx zcik vbii~ /~oapcef beh benoap vbii~# npa~~$xckh vcxo zpk~xpk~~kh xkehae~

`kekbxo xok pbcipabh nappchap% Xok fkekpbi bppbefkdkex ag xoc~ ~s~xkd c~ ~oave ceGcf{pk 2% Xok zpk~xpk~~kh xkehae~ icdcxkh xok oapc|aexbi vbii hc~zibnkdkex xa

zkpdc~~c`ik ikwki~ ~zkncgckh `s xok pbcivbs avekp) beh xok pk{~k ag xok zob~k aek~oapcef vbii b~ xok ~oapcef vbii gap xok ~knaeh zob~k ag `pchfk nae~xp{nxcaekicdcebxkh xok ekkh xa kxpbnx beh pk$hpcwk ~okkxcef) pk~{ixcef ce pkh{nkh

hc~zibnkdkex~ beh nae~xp{nxcae xcdk%

CEXPAH[NXCAE

Gap xok nae~xp{nxcae ag xok Vk~x Keh cdzpawkdkex zpalknx hk~npc`kh b`awk)

pbcivbs xpbggcn ae xok kc~xcef kd`bemdkex na{ih eax `k cexkpp{zxkh) knkzx gap b `pckgzkpcah xa ~ocgx xpbnm~ gap kbno zob~k ag nae~xp{nxcae% ^cenk xok knbwbxcae ~{zzapx

~s~xkd vb~ agg~kx bzzpacdbxkis > d /2: gx# gpad xok nkexkpicek ag xok ekbpk~x xpbnm)xok pbcivbs avekp ~zkncgckh xobx xok n{d{ibxcwk oapc|aexbi hc~zibnkdkex bx xok xaz agxok vbii `k icdcxkh xa 23 dd /:%6; ce# xa naexpai wkpxcnbi ~kxxikdkex ag xok pbci`kh%

QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ/2# B~~c~xbex Zpalknx Kefcekkp) bfn{~ocefJhbzzaiaecb%nad= /0# Zpcenczbi Kefcekkp)

nlikvc~Jhbzzaiaecb%nad= HBzzaiaecb) 06; Nkexkp Pabh) Daepakwciik) ZB 2;287=zoaek< 820$?;7$388:


2/8


3/8

>

GCF% 2% Npa~~ ^knxcae ag Xkdzapbps Npa~~$Xckh ôkkx Zcik ôapcef beh Benoap

Vbii~) Zob~k 2 Nae~xp{nxcae) bx b Dbcd{d ôapcef Vbii Okcfox ag 20%; Dkxkp~

hkxa{p) xok ~oapcef vbii ~okkx zcicef /B\$>7) Fpbhk ;:# vb~ hpcwke xa xok hkzxo icdcx~~oave ce Gcf{pk 2) vcxo xok xaz ag xok ~oapcef vbii bx Ki% 0>?%82 d /6?0 gx#%

Cecxcbi Knbwbxcae gap Xkdzapbps beh Zkpdbekex Gpkk$Nbexcikwkp

Be cecxcbi 2%;0 d /; gx# ocfo knbwbxcae xa Ki% 0>7%?3 d /666 gx# vb~ bhwbenkhce gpaex ag xok ~oapcef vbii xa k~xbìc~o b nae~xp{n xcae zibxgapd beh vapm bpkb% Xok

pbcivbs avekp va{ih eax zkpdcx b xkdzapbps /nae~xp{nxcae# nbexcikwkp naehcxcaefpkbxkp xobe >%77 d /20 gx# ocfo ap b zkpdbekex nbexcikwkp naehcxcae fpkbxkp xobe >%:;d /2: gx# ocfo beh pk~xpcnxkh xok kza~kh ikefxo ag xok xkdzapbps >%77 d /20 gx# ocfo

nbexcikwkp xa >:%; d /2:: gx# zpcap xa Ikwki 2 xck ce~xbiibxcae% Pknafec|cef xok~kpk~xpcnxcae~) b icdcxkh knbwbxcae vb~ naeh{nxkh ce gpaex ag xok ~oapcef vbii xa Ki%

0>8%67 d /66: gx= b xkdzapbps >%77 d /20 gx# ocfo nbexcikwkp# gap ce~xbiibxcae ag bececxcbi ~knxcae ag Ikwki 2 xck~ bx Ki% 0>;%>6 d /660 gx#%

Ikwki 2 ^xpbeh Xck Ce~xbiibxcae beh Zpk~xpk~~cef

Be knbwbxcae ce gpaex ag xok benoap vbii xa Ki% 0>>%;8 d /677 gx# vb~pkr{cpkh xa ce~xbii xok Ikwki 2) 6$~xpbeh xck~) vocno vkpk ~zbnkh kwkps 0%; d%

BENOAP VBII/B\$2?#

;

ÔAPCEF VBII/B\$>7#

>Ikwki 0 Xck~ ' Vbikp~

KI% 0>:%2? d

PbcivbsKd`bemdkex

Gcii

6$^xpbeh Xck

@axxad XczKI% 00:%20 d

@axxad XczKI% 008%>3 d

EAXK< Oapc|aexbi Xck ^zbncef 4 0%; d /XSZ%#

> d

28%; d

Xaz ag Vbii KI% 0>?%82 d

Gcebi Knbwbxcae KI% 00;%32 d

Ikwki 2 Xck~ ' Vbikp~KI% 0>;%>6 d

8$^xpbeh Xck


4/8

8

GCF 0% ^oapcef Vbii [ehkp Pbcivbs Iabhcef

GCF >% ^oapcef Vbii Bgxkp Ce~xbiibxcae ag Ikwki 0 Xck~


5/8

;

Xok ~xpbeh xck~ vkpk zpk~xpk~~kh xa :%8; F[X^) {~{biis gpad xok ~oapcef vbii ~chk%B~ xok ~xpbeh xck~ biaef b fcwke ~knxcae ag vbii vkpk ~xpk~~kh beh ianmkh agg) xok

knbwbxcae icdcx~ vkpk kxkehkh `s be kr{cwbikex ikefxo xa bhwbenk xok ce~xbiibxcae agxok pkdbcecef Ikwki 2 xck~%

Knbwbxcae gap Ikwki 0 ^xpbeh Xck Ce~xbiibxcae beh Zpk$~xpk~~cef

Bgxkp cenpkdkexbiis ce~xbiicef xok Ikwki 2 xck~) xok xbfk 0 knbwbxcae xa Ki%003%;6 d /6;> gx# beh Ki% 00?%37 d /6;2 gx# ce gpaex ag xok ~oapcef beh benoap vbii~)

pk~zknxcwkis) naddkenkh xa kebìk xok ce~xbiibxcae ag xok Ikwki 0) 8$~xpbeh xck~ ~zbnkhkwkps 0%; d bx Ki% 0>:%2? d /6;; gx#% Aenk xok Ikwki 0 xck~ vkpk ce~xbiikh behzpk~xpk~~kh) `bnmgcii vb~ zibnkh ce gpaex ag xok benoap vbii xa bzzpacdbxk xok apcfcebi

fpbhk ag xok kd`bemdkex%

Gcebi Hkzxo ag Knbwbxcae) ôapcef Vbii ^chk

Xok npcxcnbi zapxcae~ ag xok ~oapcef vbii kdziaskh xva xck ikwki~) b~ zpkwca{~ishk~npc`kh) beh pkr{cpkh b gcebi knbwbxcae xa Ki% 00;%32 d /682 gx#) b~ ~oave ceGcf{pk 2) pk~{ixcef ce b 20%; d /82 gx# ocfo vbii% Aeis aek xck ikwki /?$~xpbeh xck~# vb~

pkr{cpkh gap xok pkdbcecef zapxcae~ ag xok vbii vokpk xok gcebi knbwbxcae icek pbefkhgpad Ki% 003%;6 d /6;> gx# xa Ki% 00?%0: d /68?%; gx#% Xok gcebi knbwbxcae gap xokb`{xdkex nae~xp{nxcae vb~ zob~kh xa nia~kis nacenchk vcxo xok cecxcbxcae ag

ga{ehbxcae nae~xp{nxcae%

OAPC\AEXBI HC^ZIBNKDKEX ZPKHCNXCAE^ BEH DKB^[PKDKEX^

B~ eaxkh zpkwca{~is) xok hk~cfe ag xok knbwbxcae ~{zzapx ~s~xkd vb~ dbceis

hpcwke `s xok pbcivbs avekp~ pkr{cpkdkex~ xa icdcx hc~p{zxcae ag xpbce xpbggcn behnaexpai oapc|aexbi vbii hc~zibnkdkex~ beh ~kxxikdkex ag xok pbci`kh% Ce xok gaiiavcef

~{`~knxcae~) oapc|aexbi vbii hc~zibnkdkex~ gap xok nbexcikwkp /àxo xkdzapbps behzkpdbekex# beh ~cefik xck ikwki naehcxcae~ bpk kwbi{bxkh% Ce bhhcxcae) xok a`~kpwkhhc~zibnkdkex~ bpk hc~n{~~kh%

Zpkhcnxkh Hc~zibnkdkex Xkdzapbps beh Zkpdbekex Nbexcikwkp Naehcxcae~

Xok ~oapcef vbii oapc|aexbi hc~zibnkdkex zpkhcnxcae~ zpk~kexkh ce xoc~ ~knxcaebzzis xa xok xkdzapbps beh zkpdbekex nbexcikwkp naehcxcae~ /c%k%) ^xbfk 2 knbwbxcae

gap xck ce~xbiibxcae beh zkpdbekex gpkk nbexcikwkp vbii ~knxcae~#% Xok dkxoah {~kh xazpkhcnx xok~k nbexcikwkp vbii hc~zibnkdkex~ cewaiwkh b xva$~xkz zpank~~% Gcp~x) xok

dbcd{d oapc|aexbi hc~zibnkdkex bx xok xaz ag xok vbii b~~ancbxkh vcxo xokhkwkiazdkex ag xok bnxcwk kbpxo zpk~~{pk vb~ hkxkpdcekh) vcxoa{x nae~chkpbxcae ag xokkggknx ag xok pbcipabh ~{pnobpfk% Xok pkibxcae~ocz~ pkzapxkh `s Nia{fo beh H{enbe

/2332# vkpk kdziaskh% B~ b nae~kr{kenk ag xok zpk$iabhcef kggknx ag xok pbcivbsxpbggcn ae xok kc~xcef kd`bemdkex ~aci~) xok pkibxcae~ocz gap dkhc{d$hke~k ~beh vb~

bhazxkh% Ae xoc~ `b~c~) xok oapc|aexbi hc~zibnkdkex pkr{cpkh xa da`cic|k xok bnxcwkkbpxo zpk~~{pk c~ bzzpacdbxkis :%::0 xcdk~ xok kza~kh nbexcikwkp vbii okcfox on%


6/8

7

Xok bhhcxcaebi kggknx ag xok pbcipabh ~{pnobpfk ae xok oapc|aexbi hc~zibnkdkex

vb~ hkxkpdcekh `s cexpah{ncef xok gbnxap gro) vocno c~ nadz{xkh b~ gaiiav~ /22: zng# vkpk {~kh xa

nbin{ibxk Mb beh w ) nae~c~xkex vcxo xok zpk~npc`kh zpazkpxck~% Xok pk~{ix~ ag xoc~

xva$~xkz zpankh{pk bpk ~{ddbpc|kh ce Xb`ik 2%

XB@IK 2% ^{ddbps ag Zpkhcnxkh Oapc|aexbi Hc~zibnkdkex~ bx Xaz ag Vbii gapxok Xkdzapbps beh Zkpdbekex Nbexcikwkp Naehcxcae~

Dbcd{d Oapc|aexbi Hc~zibnkdkex

bx Xaz ag Vbii) o dd /ce#

Kza~kh

NbexcikwkpOkcfox

on) d /gx#Xkdzapbps Nbexcikwkp

NaehcxcaeZkpdbekex Nbexcikwkp

Naehcxcae

>%77 /20# 20%6? /:%;:># E!B

>%:; /2:# E!B 28%>> /:%;78#

Naenkpecef wbi{k~ ag on 4 >%77 beh >%:; d /20 beh 2: gx#) xok zpkhcnxkh

dbcd{d oapc|aexbi hc~zibnkdkex~ bx xok xaz ag xok ~oapcef vbii gap `axo xok


7/8

6

xkdzapbps beh zkpdbekex nbexcikwkp naehcxcae~ bpk ik~~ xobe xok ~zkncgckh icdcx ag 23dd /:%6; ce#) vcxo wbi{k~ gap xok xkdzapbps naehcxcae bzzpacdbxcef 2> dd /:%; ce#%

Xck Zpk~xpk~~ beh Zpkhcnxkh Vbii Hc~zibnkdkex $ ^cefik Xck Ikwki

Ce hkxkpdcecef xok pkr{cpkh zpk~xpk~~ gap xok {zzkp xck ikwki) xok gaiiavcefcenpkdkexbi hc~zibnkdkex~ gap xopkk ~xbfk~ ag nae~xp{nxcae vkpk nae~chkpkh%77 d /20 gx# nbexcikwkp vcxo fpa{eh ~{pgbnk bx Ki% 0>?%82 d/6?0 gx# beh n{x xa Ki% 0>8%67 d /66: gx#

Hc~zibnkdkex gap xoc~ ~xbfk c~ bhhpk~~kh ce Xbìk 2%^xbfk 0;%>6 d /660 gx#

Hc~zibnkdkex pkh{nxcae h{k xa vbii dawkdkex cexa xok kc~xcef

kd`bemdkex%^xbfk >b%# ^xpbeh xck kiaefbxcae /cg xok zpk~xpk~~ ikwki c~ ik~~ xobe xok bnx{biceh{nkh pkbnxcae ]zpk~{dkh xa `k :%7 F[X^T#

>`%# ^xp{nx{pbi nbexcikwkp dawkdkex /vcxo on 4 >%:; d 4 2: gx# bàwk xok xckikwki) vocno ann{p~ ce pk~zae~k xa xok cenpkb~k ce pbcipabh ~{pnobpfk `kxvkke

xok xkdzapbps beh zkpdbekex naehcxcae~% Xok bwkpbfk cenpkb~k ce oapc|aexbi~{pnobpfk zpk~~{pk vcxoce xok xaz >%:; d ag xok ~oapcef vbii c~bzzpacdbxkis 8%? mZb /:%2 m~g#%

Xok nbin{ibxcae~ hkdae~xpbxkh xobx b zpk~xpk~~ ikwki ag :%80 F[X^ va{ih naexpai xok

dbcd{d oapc|aexbi hc~zibnkdkex ag xok xaz ag xok ~oapcef vbii xa ik~~ xobe 23 dd/:%6; ce#% Xokpkgapk) b xbpfkx zpk~xpk~~ ikwki ag :%8; F[X^ vb~ ~{`~kr{kexis~zkncgckh% Cenpkdkexbi beh n{d{ibxcwk oapc|aexbi hc~zibnkdkex~ gap ^xbfk~ 2 xopa{fo

> bpk ~{ddbpc|kh ce Xbìk 0 gap b zpk~xpk~~ ikwki ag :%80 F[X^% Gap ~knxcae~ ag vbii~vcxo xva pav~ ag xck~) beh b gcebi knbwbxcae xa Ki% 00;%32 d /682 gx#) xok kggknx~ ag

zpk~xpk~~cef xok àxxad pav ag xck~ xa :%8; F[X^ beh xok ~{`~kr{kex bhhcxcaebiknbwbxcae vkpk bzzpacdbxkis kr{bi beh azza~cxk) pk~{ixcef ce ea bzzpkncbìkcegi{kenk ae xok pk~{ixcef n{d{ibxcwk ibxkpbi hc~zibnkdkex gap xok ~cefik xck naehcxcae

zpawchkh ce Xbìk 0%

Bixoa{fo zpk~xpk~~cef xok npa~~$xck xkehae~ xa xok g{ii hk~cfe iabh ag :%7F[X^ va{ih obwk pk~{ixkh ce iavkp nbin{ibxkh oapc|aexbi vbii hc~zibnkdkex~) xoc~azxcae vb~ eax ~kiknxkh h{k xa naenkpe gap zaxkexcbi ~xpbeh awkp~xpk~~) k~zkncbiis

nae~chkpcef xobx b ~cfecgcnbex zpazapxcae ag xok hk~cfe iabh vb~ xpbe~ckex%

A`~kpwkh Hc~zibnkdkex~

Xok dbcd{d oapc|aexbi hc~zibnkdkex bx xok xaz ag xok ~oapcef vbii h{pcef

nae~xp{nxcae vb~ ea dapk xobx 2> dd /:%; ceno#) vocno vb~ ~adkvobx ik~~ xobe xokzpkhcnxkh wbi{k ag 2?%6 dd% Xok nae~kpwbxcwk ebx{pk ag xok hc~zibnkdkex k~xcdbxk

vb~ da~x icmkis bxxpc`{xbìk xa xok gbnx xobx xok zpk~npc`kh Naazkp K$?: iabhcef vb~


8/8

?

hkwkiazkh gap ~xkbd ianadaxcwk~) vocno bpk fkekpbiis okbwckp xobe dahkpe hbs hck~kikefcek~%

XB@IK 0% ^{ddbps ag Zpkhcnxkh Cenpkdkexbi beh N{d{ibxcwk Oapc|aexbi

Hc~zibnkdkex~ bx Xaz ag Vbii gap ^cefik$Xck Vbii ^knxcae)

vcxo :%80 F[X^ Xck Zpk~xpk~~

^xbfkKnbwbxcaeKi% d /gx#

Wkpxcnbi PP^{pnobpfk

@b~kicek Oapc|%Hc~zibnkdkex J

X%A%V%) dd /ce#

2 Xkdz% Nbexickwkp 2 4 20%? /:%;:>#0 Ikwki 2 Xck Zpk~xpk~~cef

0>8%67/66:%:#

Ekbp< 3: mZbGbp< 8; mZb 0 4 $0>%> /$:%327#

> /b# Xck Kiaefbxcae >b 4 0?%3 /2%2>3#> /`# Bhhkh PP ^{pnobpfk

00?%0:

/68?%;#

Ekbp< 3: mZb

Gbp< 3: mZb >` 4 :%> /:%:20#

Zpkhcnxkh N{d{ibxcwk Hc~zibnkdkex

^cefik Xck Vbii ^knxcaeo 4 2?%6 /:%6>?#

^[DDBPS

Xoc~ zbzkp ob~ ~{ddbpc|kh xok hk~cfe beh nae~xp{nxcae ~kr{kencef ag bxkdzapbps knbwbxcae ~{zzapx ~s~xkd nae~c~xcef ag azza~cef ~okkx zcik vbii~ /~oapcef

beh benoap vbii~# npa~~$xckh vcxo zpk~xpk~~kh xkehae~ `kekbxo b pbcipabh nappchap xagbncicxbxk xok nae~xp{nxcae ag b ekv pbcivbs `pchfk beh ocfovbs {ehkpzb~~ ce

Zcxx~`{pfo~ Vk~x Keh% Xok oapc|aexbi agg~kx ag xok zpaza~kh benoap vbii gpad xok~oapcef vbii) b~ ~oave ce Gcf{pk 2) vb~ fpkbxkp xobx ~kx gap gapxo ce xok apcfcebihk~cfe) vocno zkpdcxxkh naexce{a{~ azkpbxcae ag pbcivbs xpbggcn h{pcef bii zob~k~ ag

nae~xp{nxcae) vcxo xok knkzxcae ag `pckg zkpcah~ gap xpbnm pkianbxcae gap kbno zob~k ag

`pchfk nae~xp{nxcae% Bi~a) xok {~k ag zpk~xpk~~kh xkehae xck~ icdcxkh xok oapc|aexbivbii hc~zibnkdkex xa zkpdc~~c`ik ikwki~ ~zkncgckh `s xok pbcivbs avekp% Ce bhhcxcae)xok pk{~k ag xok ~oapcef vbii gpad Zob~k 2 `pchfk nae~xp{nxcae b~ xok ~oapcef vbii gapxok ~knaeh zob~k kicdcebxkh xok ekkh xa kxpbnx beh pk$hpcwk ~okkxcef) vocno pk~{ixkh

ce pkh{nkh hc~zibnkdkex~ beh nae~xp{nxcae xcdk%

PKGKPKENK^

BPKDB /0::2#% Dbe{bi gap Pbcivbs Kefcekkpcef) Bdkpcnbe Pbcivbs Kefcekkpcef

beh Dbcexkebenk$ag$Vbs B~~ancbxcae%

Nia{fo) F%V% beh H{enbe) L%D% /2332#% Kbpxo Zpk~~{pk~) Ga{ehbxcae KefcekkpcefObeh`aam /Nobzxkp 7#) ^knaeh Khcxcae) S%O% Gbef) Kh%) Wbe Ea~xpbehPkceoaih) Ekv Sapm%

temporary excavation support system for a new railway bridge and highway underpass in pittsburgh,...

Documents